WO2019039598A1 - Antenna device, wireless base station, and antenna device container - Google Patents

Antenna device, wireless base station, and antenna device container Download PDF

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Publication number
WO2019039598A1
WO2019039598A1 PCT/JP2018/031420 JP2018031420W WO2019039598A1 WO 2019039598 A1 WO2019039598 A1 WO 2019039598A1 JP 2018031420 W JP2018031420 W JP 2018031420W WO 2019039598 A1 WO2019039598 A1 WO 2019039598A1
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WO
WIPO (PCT)
Prior art keywords
antenna
antenna device
manhole
height
base
Prior art date
Application number
PCT/JP2018/031420
Other languages
French (fr)
Japanese (ja)
Inventor
義幸 河野
潤 安藤
弘樹 高橋
山▲崎▼　拓
健介 宮地
Original Assignee
株式会社Ｎｔｔドコモ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Priority to JP2019537713A priority Critical patent/JP6965355B2/en
Priority to CN202110829287.9A priority patent/CN113594664B/en
Priority to CN201880059932.XA priority patent/CN111108645A/en
Priority to US16/640,935 priority patent/US11349189B2/en
Priority to EP22185450.8A priority patent/EP4096016A1/en
Priority to EP18849174.0A priority patent/EP3660978B1/en
Publication of WO2019039598A1 publication Critical patent/WO2019039598A1/en
Priority to US17/455,353 priority patent/US11811126B2/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/04—Adaptation for subterranean or subaqueous use
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/246—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for base stations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/01—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the shape of the antenna or antenna system
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/02—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/02—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole
    • H01Q3/08—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying two co-ordinates of the orientation

Definitions

  • the present invention relates to an antenna device, a wireless base station, and an antenna device housing.
  • the manhole antenna since the distance between the human body and the antenna element becomes short, if the electric field strength of the radio wave is increased to widen the communication area, the defined radio wave protection guideline may not be satisfied. However, the prior art manhole antenna does not consider radio wave protection guidelines.
  • An object of the present invention is to provide a buried underground antenna device that can be adjusted to meet radio wave protection guidelines.
  • An antenna device is a buried underground antenna device disposed under a lid, and an antenna element and the antenna element are provided, and a distance from the antenna element to the lid And a mounting base having a height adjustment mechanism for adjusting
  • the underground buried type antenna device can be adjusted to satisfy the radio wave protection guideline.
  • FIG. 1 is a diagram showing an outline of an antenna device according to Embodiment 1; 5 is an explanatory view of an antenna angle adjustment mechanism according to Embodiment 1.
  • FIG. It is a figure which shows the simulation result of the electromagnetic wave radiation pattern of two antenna elements. It is a figure which shows the simulation result of the electromagnetic wave radiation pattern of two antenna elements. It is a figure which shows the simulation result of the electromagnetic wave radiation pattern of two antenna elements.
  • FIG. 7 is a side cross-sectional view of the antenna device according to Embodiment 2.
  • FIG. 13 is a plan view of an intermediate member of the antenna device according to Embodiment 2.
  • FIG. 16 is a side cross-sectional view of the antenna device according to Embodiment 3.
  • FIG. 16 is a side cross-sectional view of the antenna device according to the fourth embodiment.
  • FIG. 21 is a side cross-sectional view of the antenna device according to the fifth embodiment.
  • FIG. 21 is a perspective view of an antenna device according to a sixth embodiment.
  • FIG. 21 is a perspective view of an antenna device according to a seventh embodiment.
  • FIG. 21 is a plan view of an antenna device according to a seventh embodiment.
  • FIG. 21 is a side view of the antenna device according to the seventh embodiment.
  • FIG. 21 is a perspective view of the antenna device in which the distance between the antenna elements according to the seventh embodiment is changed.
  • FIG. 21 is a perspective view of an antenna device in which the wireless device according to the seventh embodiment is installed.
  • FIG. 21 is a perspective view of an antenna device in which the wireless device according to the seventh embodiment is installed.
  • FIG. 24 is a diagram for describing a portion where the wireless device of the antenna device according to Embodiment 7 is installed.
  • FIG. 21 is a diagram showing an example of a cross-sectional view of a side surface of a manhole according to a seventh embodiment.
  • FIG. 21 is a diagram showing an example of a plan view of a manhole according to a seventh embodiment.
  • FIG. 21 is a view showing an example of a cross section taken along the line A-A ′ of a manhole according to a seventh embodiment.
  • FIG. 21 is a diagram showing an example of configuration of a demonstration experiment station according to a seventh embodiment.
  • Embodiment 1 ⁇ Overview of Antenna Device> First, the outline of the underground buried type antenna device 10 will be described with reference to FIG.
  • the antenna device 10 is installed in a manhole 100 formed under the ground 2.
  • Side walls 101 are provided on the side surfaces of the manhole 100.
  • the manhole cover 102 is inserted into a groove formed in an edge portion 103 of the side wall portion 101 on the ground surface 5 side to close the manhole 100.
  • the manhole 100 is located under the ground 2 so that a person can enter and exit from the ground in order to control piping such as water and sewage pipes or gas pipes buried in the ground, wiring of communication cables, or distribution of electric cables, etc. It is a formed vertical hole.
  • the manhole 100 in which the antenna device 10 is installed does not necessarily have to be large enough for people to go in and out, and may be a hole the size in which people can not go in and out like a so-called handhole.
  • the antenna device 10 may be installed in a manhole 100 (or hand hole) for existing equipment, or installed in a hole (or recess etc.) newly formed for the antenna device 10 It is also good. That is, the antenna device 10 may be installed in any hole formed below the ground 2.
  • the manhole cover 102 is also merely an example of a cover for closing a hole formed under the ground 2, and may be any cover.
  • the antenna device 10 is placed on the ground in the manhole 100 as shown in FIG.
  • the antenna device 10 may be installed so as to be suspended in the manhole 100.
  • the antenna device 10 includes an arm (not shown), and the arm is hooked to the edge 103 of the side wall 101.
  • the antenna device 10 includes a support 11, an antenna mount 12, an antenna element 13, an antenna angle adjustment mechanism 14, and an antenna height adjustment mechanism 15.
  • the support portion 11 supports the antenna mount 12 via the antenna height adjustment mechanism 15.
  • the antenna stand 12 holds the antenna element 13 via the antenna angle adjustment mechanism 14.
  • the antenna element 13 is connected to the base station via the connector cable 16 and transmits and receives radio waves to and from the portable terminal 4.
  • the base station is, for example, a wireless LAN (Wi-Fi) base station or a base station such as LTE or 5G.
  • the antenna angle adjustment mechanism 14 adjusts the angle of the antenna element 13. The details of the antenna angle adjustment mechanism 14 will be described later.
  • the antenna height adjustment mechanism 15 adjusts the height (the distance to the manhole cover 102) of the antenna stand 12. An adjustment example of the antenna height adjustment mechanism 15 will be described later.
  • Radio wave protection guidelines Next, radio wave protection guidelines will be described.
  • the radio base station when the radio base station is installed at a high place, since the distance between the human body (user) 3 and the antenna device 10 is relatively long, the desired communication distance ( Or to obtain a communication area) is not so difficult.
  • the human body 3 may pass just above the antenna device 10, and the distance between the human body 3 and the antenna device 10 is relatively short. In order to lengthen the communication distance as much as possible while satisfying the conditions of the radio wave protection guidelines, delicate adjustments are required.
  • the antenna device 10 including the antenna angle adjustment mechanism 14 and the antenna height adjustment mechanism 15 is provided so that such adjustment can be easily performed at the installation site.
  • the distance from the antenna element 13 to the manhole cover 102 is increased (that is, separated from the ground surface 5) by the antenna height adjustment mechanism 15. Thereby, the electromagnetic field intensity at the measurement point above the antenna device 10 can be weakened.
  • the distance from the antenna element 13 to the manhole cover 102 is reduced by the antenna height adjusting mechanism 15 (that is, it approaches the ground surface 5).
  • the antenna height adjustment mechanism 15 A specific configuration example of the antenna height adjustment mechanism 15 will be described in the second to sixth embodiments.
  • the antenna angle adjustment mechanism 14 enables the antenna element 13 to be rotated by 90 degrees in the horizontal direction with respect to the main surface of the antenna base 12 as shown in FIG. 2 (A), and as shown in FIG. 2 (B) This is a mechanism that allows the element 13 to be rotated 90 degrees in the vertical direction with respect to the main surface of the antenna stand 12.
  • the antenna can be rotated in the vertical direction, and the antenna cable 13 extending from the antenna element 13 can pass under the antenna base 12 as shown in FIG.
  • a hole 17 is formed in the vicinity of the lower portion of the antenna angle adjustment mechanism 14 in the pedestal 12.
  • the shape of the hole 17 is, for example, a fan shape having a central angle of 90 degrees.
  • the antenna element 13 is housed in an antenna case and protected from external dust and rain water.
  • the antenna angle adjustment mechanism 14 may be a mechanism that allows the antenna case housing the antenna element 13 to be rotatable.
  • radio wave radiation patterns simulation results
  • the plurality of radio wave radiation patterns shown in FIG. 3 to FIG. 5 are for radio waves of 1.5 GHz, 1.8 GHz, 2 GHz, and 3.5 GHz, respectively.
  • FIG. 3 shows the arrangement G1 in which the two antenna elements 13 are separated by 300 mm, and the angle is adjusted so that the main axes of the two antenna elements 13 become parallel to the X axis. Shows a radio wave radiation pattern at a distance of 130 mm.
  • FIG. 4 shows the arrangement G2 in which two antenna elements 13 are separated by 300 mm, and the angle is adjusted so that the main axes of the two antenna elements 13 are parallel to the Z axis. Shows a radio wave radiation pattern at a distance of 100 mm.
  • the two antenna elements 13 are separated by 300 mm, and the main axis of the other antenna element 13 is parallel to the Z axis so that the main axis of one antenna element 13 is parallel to the X axis.
  • the horizontal axis indicates the Y-axis direction
  • the vertical axis indicates the Z-axis direction
  • the horizontal axis indicates the X axis direction
  • the vertical axis indicates the Z axis direction
  • the horizontal axis indicates the Y-axis direction
  • the vertical axis indicates the X-axis direction.
  • the antennas of the two antenna elements 13 it can be seen that it is preferable to adjust the antenna angle adjustment mechanism 14 so that the axis is parallel to the Z axis.
  • FIGS. 3 to 5 above show that the radio wave radiation pattern changes when the angle of the antenna element 13 is changed to the last, and the simulation results of FIGS. 3 to 5 limit the invention in any way. It is not a thing.
  • the underground buried antenna device 10 includes the antenna angle adjustment mechanism 14 for adjusting the angle of the antenna element 13 and the antenna height adjustment mechanism 15 for adjusting the height of the antenna base 12. Equipped with As a result, the operator can easily perform adjustment for extending the communication distance as much as possible while satisfying the conditions of the radio wave protection guideline at the installation site of the antenna device 10.
  • FIGS. 6 and 7 is a side sectional view of the antenna device 10A
  • FIG. 7 is a plan view of the intermediate member 24 which is a component of the antenna device 10A as viewed from above.
  • the same components as in the first embodiment will be assigned the same reference numerals and descriptions thereof will be omitted.
  • the antenna device 10A includes an antenna base 12, an antenna element 13, and an antenna angle adjustment mechanism 14.
  • the antenna device 10A further includes a pedestal 20, a leg 21, a support 22, a height adjustment tool 23, an intermediate member 24, and a buffer 25A.
  • the pedestal 20, the legs 21, and the support 22 in the antenna device 10A correspond to an example of the support portion 11 of the antenna device 10.
  • the height adjustment tool 23 and the intermediate member 24 in the antenna device 10A correspond to an example of the antenna height adjustment mechanism 15.
  • the height adjustment tool 23 may be called a positioning part which determines the attachment position of the antenna stand 12.
  • the pedestal 20 is provided with a plurality of legs 21 on the lower surface, and is disposed horizontally to the ground by the legs 21 being grounded to the ground in the manhole 100.
  • the columns 22 are vertically fixed to the pedestal 20 and extend upward.
  • FIG. 6 shows an example in which four columns 22 are provided.
  • the present embodiment is not limited to this, and the number of posts 22 may be any number as long as it is two or more.
  • the height adjustment tool 23 is a device that can be attached to any position (height) of the support 22.
  • the height adjustment tool 23 is configured of a cylindrical portion 31 and a fixing tool 32.
  • the inner diameter of the cylindrical portion 31 is larger than the outer diameter of the support 22.
  • the column 22 is inserted into the cylindrical portion 31.
  • the fixture 32 is, for example, a screw.
  • the fixing tool 32 screw
  • the tube portion 31 is fixed to the support 22.
  • the fixing tool 32 screw
  • the fixing tool 32 is not limited to the screw type, and may be a push type or a slide type.
  • the fixing device 32 is directed in the center direction of the manhole 100 (that is, inward) so as not to interfere with installation of the antenna device 10A in the manhole 100. Is preferably arranged to protrude.
  • the intermediate member 24 is configured by an annular portion 33, a cylindrical portion 34, a reinforcing plate 35 and a bracket 36.
  • the annular portion 33 has an annular shape, and the diameter thereof is smaller than the diameter of the manhole 100 and larger than the diameter of the antenna base 12.
  • the inner diameter of the cylindrical portion 34 is larger than the outer diameter of the support 22.
  • the cylindrical portion 34 is welded to the inside of the annular portion 33.
  • the number of cylindrical portions 34 is the same as the number of columns 22.
  • the reinforcing plate 35 is welded so that the two plates cross at the center point of the annular portion 33. Furthermore, the reinforcing plate 35 is welded to the cylindrical portion 34 at the end.
  • the bracket 36 is welded to the reinforcing plate 35 in the vicinity of the cylindrical portion 34. Further, mounting holes 37 are formed in the bracket 36.
  • the intermediate member 24 is disposed above the height adjustment tool 23. That is, the columns 22 are inserted into the cylindrical portions 34 of the intermediate member 24.
  • the reason why the intermediate member 24 is reinforced by the reinforcing plate 35 instead of a simple flat plate is to prevent rainwater and the like from being collected in the intermediate member 24.
  • the buffer portion 25A is fixed to a portion of the mounting hole 37 of the bracket 36 of the intermediate member 24 by a screw or the like.
  • FIG. 6 shows four examples of the buffer unit 25A. However, the present embodiment is not limited to this, and the number of buffer portions 25A may be any number as long as it is three or more.
  • FIG. 6 shows the case where the buffer portion 25A is a spring, the present embodiment is not limited to this, and the buffer portion 25A may be rubber, a cushion or the like.
  • the rod 26 is welded to the seat surface of the antenna base 12.
  • the rod 26 is inserted into the buffer portion 25A and the mounting hole 37 in a state where the buffer portion 25A is placed on the bracket 36.
  • a nut is attached as a stopper from the tip end side of the rod 26.
  • the antenna stand 12 is fixed to the intermediate member 24, and is positioned in the height direction by the biasing force of the buffer portion 25A.
  • the positions (heights) of the intermediate member 24, the buffer portion 25A, and the antenna base 12 can be changed.
  • the position of the antenna base 12 can be moved downward (in a direction away from the manhole cover 102). Conversely, the position of the antenna base 12 can be moved upward (in the direction approaching the manhole cover 102) by moving the height adjustment tool 23 upward. Thereby, the worker can adjust the electromagnetic field intensity of the radio wave so as to satisfy the condition of the radio wave protection guideline at the installation site of the antenna device 10A.
  • the antenna base 12 by placing the antenna base 12 on the buffer portion 25A, it is possible to suppress that the vibration received from the outside by the pedestal 20, the support column 22, the intermediate member 24 and the like is transmitted directly to the antenna base 12 . As a result, it is possible to prevent the position (for example, the angle) of the antenna element 13 installed on the antenna stand 12 from shifting or the connector cable 16 of the antenna element 13 coming off due to vibration from the outside.
  • the height adjustment tool 23 may be configured to be fixed only at some predetermined positions (heights). For example, a hole is formed at a predetermined position of the column 22, a hole is formed on the side surface of the cylinder 31, and the fixing tool 32 (pin) is inserted into the hole of the cylinder 31 and the hole of the column 22. May be
  • the underground buried antenna device 10A mounts the intermediate member 24 on the height adjustment tool 23 provided on the support 22, and the antenna on the intermediate member 24.
  • a configuration for mounting the platform 12 is adopted.
  • the worker can easily change the mounting position of the height adjustment tool 23 at the installation site of the antenna device 10A, so that the height of the antenna base 12 can be easily adjusted.
  • FIG. 8 is a side sectional view of the antenna device 10B.
  • symbol is attached
  • the antenna device 10 ⁇ / b> B includes the antenna element 13, the antenna angle adjustment mechanism 14, the pedestal 20, and the legs 21 similarly to the antenna device 10 ⁇ / b> A.
  • the antenna device 10B also includes an antenna mount 12B and a buffer unit 25B.
  • the antenna base 12B is different from the antenna base 12 of the antenna device 10A in that a screw hole 43 is formed at the center.
  • the buffer portion 25B is different from the buffer portion 25A of the antenna device 10A in that it is a spring in which a through hole is formed.
  • the antenna device 10B includes the first support post 41 and the second support post 42.
  • the pedestal 20, the legs 21, the first support post 41, and the second support post 42 in the antenna device 10B correspond to an example of the support portion 11 of the antenna device 10.
  • the screw hole 43 formed in the center of the antenna base 12B in the antenna device 10B and the screw groove 44 cut in at least a part of the second support column 42 correspond to an example of the antenna height adjustment mechanism 15.
  • the first support column 41 is fixed to the center of the upper surface of the pedestal 20 perpendicularly to the main surface of the pedestal 20 and extends upward. Further, the first support post 41 is provided with a stopper 46 having a surface perpendicular to the main axis of the first support post 41.
  • the buffer portion 25B is formed with a through hole at a central portion.
  • the first support column 41 is inserted into the through hole, and the lower end of the buffer unit 25B is placed on the stopper 46.
  • the second support column 42 has a tubular shape into which the first support column 41 can be inserted, and the first support column 41 is inserted into the cylinder.
  • the second support post 42 is supported by the first support post 41 in a state in which the lower end is in contact with the upper end of the buffer portion 25B.
  • first support post 41 and the second support post 42 are provided with a rotation prevention mechanism so that the second support post 42 does not rotate with respect to the first support post 41.
  • the rotation preventing mechanism adopts, for example, a configuration in which a pin 47 attached to the second support 42 is fitted in a notch (not shown) formed in the first support 41.
  • the height of the antenna base 12B can be increased by rotating the antenna base 12B. It can be changed.
  • the position of the antenna stand 12B can be moved downward (in a direction away from the manhole cover 102).
  • the position of the antenna base 12B can be moved upward (in the direction approaching the manhole cover 102) by rotating the antenna base 12B counterclockwise.
  • the electromagnetic field intensity of the radio wave can be adjusted so as to satisfy the condition of the radio wave protection guideline at the installation site of the antenna device 10B.
  • the vibration received from the outside of the pedestal 20 and the first support column 41 is prevented from being directly transmitted to the antenna base 12B. be able to. Thereby, it is possible to prevent the position (for example, the angle) of the antenna element 13 installed on the antenna base 12B from being shifted or the connector cable 16 of the antenna element 13 coming off due to external vibration. .
  • the second support column 42 may be provided with a scale (not shown) in the height direction. Thereby, the height of the antenna stand 12B can be visually confirmed without using a survey instrument separately. That is, at the installation site, adjustment of the electromagnetic field strength of the radio wave is further facilitated.
  • the antenna height adjustment mechanism 15 may be replaced with the screw hole 43 of the antenna base 12B and the screw groove 44 of the second support column 42, and may have another configuration.
  • the height adjustment tool 23 described in FIG. 6 is attached to the second support column 42. Then, a through hole is formed at the center of the antenna base 12 B instead of the screw hole, the second support column 42 is inserted into the through hole, and the antenna base 12 is placed on the height adjustment tool 23. Also by this, by adjusting the mounting position of the height adjustment tool 23, the height of the antenna base 12B can be adjusted.
  • the underground buried antenna device 10B has a configuration in which the screw hole 43 of the antenna base 12B and the screw groove 44 of the second support column 42 are screwed together. As a result, the worker can easily adjust the height of the antenna stand 12B by rotating the antenna stand 12B at the installation site of the antenna device 10B.
  • FIG. 9 is a side sectional view of the antenna device 10C.
  • the antenna device 10C Similar to the antenna device 10B, the antenna device 10C includes an antenna element 13, an antenna angle adjustment mechanism 14, a pedestal 20, and a leg portion 21.
  • the antenna device 10C also includes an antenna mount 12C and a buffer unit 25C.
  • the antenna base 12C is different from the antenna base 12B of the antenna device 10B in that the central screw hole 43 is a through hole 54. Also, the difference is that the buffer portion 25C is a rubber or a cushion.
  • the antenna device 10C also includes a support 51 and an intermediate member 52.
  • the pedestal 20, the legs 21, and the support 51 in the antenna device 10C correspond to an example of the support 11 of the antenna device 10.
  • the intermediate member 52 in the antenna device 10C, the screw hole 53 formed in the center of the intermediate member 52, and the screw groove 44 cut in at least a part of the support column 51 correspond to an example of the antenna height adjustment mechanism 15. Do.
  • the post 51 is fixed to the center of the upper surface of the pedestal 20 perpendicularly to the pedestal 20 and extends upward.
  • FIG. 9 shows the case where the intermediate member 52 is smaller than the antenna base 12C, the present embodiment is not limited to this, and the size of the intermediate member 52 is the same as or larger than that of the antenna base 12C. It may be
  • the support 51 is inserted into the central through hole 54 and mounted on the intermediate member 52.
  • the intermediate member 52 and the intermediate member 52 are mounted by rotating the intermediate member 52.
  • the height of the antenna stand 12C can be changed.
  • the position of the antenna base 12C can be moved downward (in a direction away from the manhole cover 102).
  • the position of the antenna base 12 can be moved upward (in the direction approaching the manhole cover 102).
  • the buffer portion 25C on the upper surface of the intermediate member 52, it is possible to suppress direct transmission of the vibration received from the outside by the leg portion 21, the support 51 and the intermediate member 52 to the antenna base 12C. As a result, it is possible to prevent the position (for example, the angle) of the antenna element 13 installed on the antenna stand 12C from shifting or the connector cable 16 of the antenna element 13 coming off due to vibration from the outside.
  • a rotation prevention mechanism (not shown) is provided so that the antenna base 12C does not freely rotate around the support column 51 due to vibration or the like.
  • a hole (not shown) is formed in a portion in contact with the intermediate member 52 of the antenna base 12C, and the intermediate member 52 has a projection (not shown) extending upward, and the projection Is inserted into the hole of the antenna base 12C.
  • a plurality of holes may be formed on the antenna base 12 at equal intervals concentrically. Thereby, antenna stand 12C can be fixed to the position of a desired rotation angle.
  • the support 51 may be provided with a scale (not shown) in the height direction. Thereby, the height of the antenna stand 12C can be visually confirmed without using a survey instrument separately. That is, adjustment of the electromagnetic field intensity of the radio wave at the installation site becomes easier.
  • FIG. 10 is a side sectional view of the antenna device 10D.
  • the same components as in the antenna device 10B of FIG. 8 will be assigned the same reference numerals and descriptions thereof will be omitted.
  • the antenna device 10D includes the antenna element 13 and the antenna angle adjustment mechanism 14 similarly to the antenna device 10B.
  • the antenna device 10D further includes an antenna base 12D, a handle 61, a shaft 62, a bearing 63, and a guide 64.
  • the antenna stand 12D is different from the antenna stand 12B in that a protrusion 66 is provided on the side surface.
  • the shaft portion 62 in the antenna device 10D corresponds to an example of the support portion 11 of the antenna device 10.
  • the screw hole 43 of the antenna base 12D in the antenna device 10D and the screw groove 44 cut in at least a part of the shaft portion 62 correspond to an example of the antenna height adjustment mechanism 15.
  • the handle portion 61 is disposed horizontally below the manhole cover 102 so as to face the manhole cover 102.
  • the shaft portion 62 is welded at one end to the center of the handle portion 61 perpendicularly to the handle portion 61 and extends upward.
  • the bearing portion 63 is provided at the center of the lower surface of the manhole cover 102, and rotatably receives the other end of the shaft portion 62 (that is, the end not welded to the handle portion 61).
  • the screw hole 43 of the antenna base 12D is screwed with the screw groove 44 of the shaft portion 62.
  • the guide groove 64 is formed with a slide groove 65 in the longitudinal direction.
  • the guide portion 64 is fixed to the side wall portion 101 so that the slide groove 65 is parallel to the shaft portion 62.
  • the protrusion 66 of the antenna base 12D is inserted into the slide groove 65. Thereby, rotation of antenna stand 12D is prevented. Therefore, the slide groove 65 and the projection 66 of the antenna base 12D correspond to an example of the rotation preventing mechanism.
  • the handle portion 61 is rotated to axially rotate the shaft portion 62.
  • the height of the antenna stand 12D can be changed.
  • the position of the antenna base 12D can be moved upward (in a direction approaching the manhole cover 102).
  • the position of the antenna base 12D can be moved downward (in a direction away from the manhole cover 102).
  • the projection 66 inserted in the slide groove 65 prevents the rotation of the antenna base 12D, the antenna base 12D moves in the vertical direction without rotating.
  • the guide portion 64 may be provided with a scale 67 in the height direction. Thereby, the height of antenna stand 12D can be checked visually, without using a survey instrument separately. That is, adjustment of the electromagnetic field intensity of the radio wave at the installation site becomes easier.
  • FIG. 11 is a perspective view of the antenna device 10E.
  • the antenna device 10E includes the antenna element 13, the antenna angle adjustment mechanism 14, and the shaft portion 62.
  • the antenna device 10E further includes an antenna base 12E, a support 22, a handle portion 71, and a manhole cover 102.
  • the antenna stand 12E is different from the antenna stand 12B shown in FIG. 8 in that a through hole 72 is formed in a portion other than the center. The inner diameter of the through hole 72 is larger than the outer diameter of the support 22.
  • the support 22 and the shaft portion 62 in the antenna device 10E correspond to an example of the support portion 11 of the antenna device 10.
  • the screw hole 43 of the antenna base 12E and the screw groove 44 of the shaft portion 62 in the antenna device 10E correspond to an example of the antenna height adjustment mechanism 15.
  • the support 22 is fixed to a portion other than the center of the manhole cover 102 perpendicularly to the manhole cover 102 and extends downward.
  • FIG. 11 shows an example in which two columns 22 are provided.
  • the present embodiment is not limited to this, and the number of posts 22 may be one or three or more.
  • the shaft portion 62 is provided vertically at the center of the manhole cover 102 with respect to the manhole cover 102 and extends downward.
  • the upper end of the shaft portion 62 is received by a bearing portion (not shown) of the manhole cover 102, and is axially rotatable.
  • the screw hole 43 of the antenna base 12E is screwed with the screw groove 44 of the shaft portion 62. Further, a support 22 is inserted into the through hole 72 of the antenna stand 12E.
  • the handle portion 71 can be connected to the shaft portion 62.
  • the shaft portion 62 is axially rotated.
  • a through hole 73 for connecting the handle portion 61 to the shaft portion 62 from the outside is formed.
  • the handle portion 71 is inserted into the shaft portion via the through hole 73 of the manhole cover 102.
  • the height of the antenna base 12E can be changed by connecting it to 62 and rotating it. That is, the height of the antenna stand 12E can be adjusted without opening the manhole cover 102.
  • the position of the antenna base 12E can be moved upward (in the direction approaching the manhole cover 102). Conversely, by rotating the handle portion 71 counterclockwise to rotate the shaft portion 62, the position of the antenna base 12E can be moved downward (in a direction away from the manhole cover 102).
  • the antenna mount 12E moves in the vertical direction without rotating. Therefore, the through hole 72 of the antenna base 12 and the support 22 inserted into the through hole 72 correspond to an example of the rotation preventing mechanism.
  • a scale (not shown) may be provided on the shaft portion 62 or the support 22 in the height direction. Thereby, the height of the antenna stand 12E can be visually confirmed without using a survey instrument separately. That is, adjustment of the electromagnetic field intensity of the radio wave at the installation site becomes easier.
  • the screw hole 43 of the antenna base 12E and the screw groove 44 of the shaft portion 62 are screwed together, and the through hole 73 of the manhole cover 102 is formed.
  • the handle portion 71 is configured to be connectable to the shaft portion 62 via the same. Thereby, the worker connects the handle portion 71 to the shaft portion 62 via the through hole 73 of the manhole cover 102 and rotates the manhole cover 102 without opening it at the installation site of the antenna device 10E.
  • the height of the antenna base 12E can be easily adjusted.
  • FIG. 12 is a perspective view of the antenna device 10F.
  • FIG. 13 is a plan view of the antenna device 10F.
  • FIG. 14 is a side view of the antenna device 10F.
  • FIG. 14 is a figure at the time of enlarging the height of the antenna apparatus 10F, and accommodating the said antenna apparatus 10F in the manhole 100.
  • FIG. 12 is a perspective view of the antenna device 10F.
  • FIG. 13 is a plan view of the antenna device 10F.
  • FIG. 14 is a side view of the antenna device 10F.
  • FIG. 14 is a figure at the time of enlarging the height of the antenna apparatus 10F, and accommodating the said antenna apparatus 10F in the manhole 100.
  • FIG. 12 is a perspective view of the antenna device 10F.
  • FIG. 13 is a plan view of the antenna device 10F.
  • FIG. 14 is a side view of the antenna device 10F.
  • FIG. 14 is a figure at the time of enlarging the height of
  • the antenna device 10F includes a bottom frame 201, legs 202, a support 207, an upper frame 208, a first reinforcing member 220, a second reinforcing member 221, an antenna element 13, a device mounting plate 240, and a handle 250.
  • the bottom frame 201 is a square frame structure. Holes 210 for fixing the legs 202 are formed at the four corners of the bottom frame 201, respectively.
  • the four legs 202 respectively move in the vertical direction by screwing with the ground portion 203, a rod 204 extending vertically upward from the ground portion 203, and a screw groove formed in the rod 204. And a possible height adjustment tool 205.
  • the rods 204 in the legs 202 are inserted into the holes 210 in the corners of the bottom frame 201 from the upper part.
  • the bottom frame 201 is supported by the height adjustment tool 205 in a state where the bottom surface of the bottom frame 201 is in contact with the top surface of the height adjustment tool 205.
  • the height h is adjusted Do.
  • a nut (not shown) is screwed from above the rod 204 to fix the leg portion 202 to the bottom frame 201.
  • a rubber material may be used for the ground portion 203 of the leg portion 202.
  • the vibration of the manhole 100 can be suppressed from being transmitted to the antenna device 10F, and the positional deviation of the antenna device 10F in the manhole 100 can be suppressed.
  • the lower ends of the four columns 207 are fixed to the four corners of the bottom frame 201 and extend vertically upward. As shown in FIG.12 and FIG.13, the outer surface of the support
  • the upper frame 208 is a rectangular frame structure similar to the bottom frame 201.
  • the four corners of the upper frame 208 are fixed to the upper ends of the four columns 207, respectively.
  • the first reinforcing members 220 are provided on one diagonal of the bottom frame 201, and both ends thereof are fixed to the corners or sides of the bottom frame 201, respectively. Thereby, the frame structure of the bottom frame 201 is reinforced.
  • the second reinforcing member 221 is provided on one diagonal of the upper frame 208 parallel to the first reinforcing member 220, and both ends thereof are fixed to the corners or sides of the upper frame 208, respectively. Thereby, the frame structure of the upper frame 208 is reinforced.
  • the two antenna elements 13 are respectively disposed on the second reinforcing member 221 and extend vertically upward.
  • the two antenna elements 13 can be installed at arbitrary positions on the second reinforcing member 221, respectively. For example, as shown in FIG. 15, the distance between two antenna elements can be adjusted.
  • the length of the second reinforcing member 221 is larger than the length of one side of the upper frame 208. Therefore, by providing the two antenna elements 13 on the second reinforcing member 221 as in the present embodiment, the movable areas of the two antenna elements 13 can be made more than those provided on one side of the upper frame 208. It can be taken large. That is, the distance between the two antenna elements 13 can be adjusted more flexibly.
  • the reinforcement of the upper frame 208 and the expansion of the movable range of the antenna element 13 are provided. Both can be realized.
  • the device mounting plate 240 has one end fixed to the first reinforcing member 220 and the other end fixed to the second reinforcing member 221. As shown in FIG. 16, a low power small optical remote radio equipment (SRE) 300 is mounted on the device mounting plate 240.
  • the device mounting plate 240 may be provided with a mechanism for fixing the wireless device 300.
  • the mechanism may be a slide mechanism. Alternatively, the mechanism may be a bolt and nut fastening mechanism. Further, as shown in FIG. 17, the device mounting plate 240 may be capable of arbitrarily changing the position in the vertical direction in accordance with the size of the wireless device 300.
  • the antenna element 13 is connected to the wireless device 300 via a connector cable (not shown).
  • wireless base station what attached the radio
  • the two handles 250 are fixed on opposite sides of the upper frame 208, respectively.
  • the handle 250 is used when taking out the antenna device 10F from the manhole 100.
  • the post 207 is provided with a hook 251.
  • the communication cable 301 and the electric cable 302 which are connected to the wireless device 300 through the conduit 105 (see FIG. 14) have a sufficient length so that the antenna device 10F can be taken out of the manhole 100. Therefore, as shown in FIG. 16, when the antenna device 10F is accommodated in the manhole 100, the cables 301 and 302 are hooked on the hook 251. As a result, it is possible to prevent the cables 301 and 302 from being broken due to being tangled or bent. As shown in FIG. 16, the hooks 251 project from the support column 207 in the direction toward the inside of the antenna device 10F.
  • the hook 251 does not get caught in the manhole 100 when the antenna device 10F is accommodated in the manhole 100.
  • this configuration is an example, and the hooks 251 may protrude from the support column 207 in the direction toward the outside of the antenna device 10F, or may be other configurations.
  • the maximum width (diagonal length) F1 of the antenna device 10F may be as close as possible to the inner diameter R1 of the manhole 100 within a range that can be accommodated in the manhole 100.
  • the first reinforcing member 220 and the second reinforcing member 221 are not directly fixed to the bottom frame 201 and the upper frame 208, respectively, but the first reinforcing member 220, the second reinforcing member 221, the antenna element 13 and the device attachment
  • the component part by the plate 240 may be configured as follows. That is, the device mounting portion may have a sliding mechanism (not shown) in the vertical direction. With this configuration, the device attachment portion can be taken out of the manhole 100 without taking out the entire antenna device 10F from the manhole 100. Therefore, maintenance work of the antenna element 13 and the wireless device 300 is facilitated.
  • a handle (not shown) may be provided on the second reinforcing member 221 in order to facilitate the sliding operation of the device mounting portion.
  • FIG. 18A shows an example of a cross-sectional view of the side surface of the manhole 100.
  • FIG. 18B shows an example of a plan view of the manhole 100.
  • FIG. 18C shows an example of a cross-sectional view taken along the line AA 'of the drawing of the manhole 100 shown in FIG. 18A.
  • the height H 1 inside the manhole 100 is larger than the entire height of the antenna device 10 F including the antenna element 13.
  • the antenna device 10F can be accommodated in the manhole 100.
  • the height H2 may be, for example, 600 mm.
  • the thickness H2 of the manhole cover 102 is a thickness that has no problem even if a person or a car gets on the manhole cover 102.
  • the manhole cover 102 be made of a material that does not affect the radio wave propagation of the antenna device 10F installed in the manhole 100.
  • the manhole cover 102 may be made of FRP (Fiber-Reinforced Plastics).
  • the thickness H2 of the manhole cover 102 may be, for example, 50 mm.
  • the height H3 of the entire manhole 100 is a size in consideration of the height H1 in the above-mentioned manhole and the height H2 of the manhole cover 102.
  • the height H3 may be 750 mm.
  • the inside diameter R1 of the entrance and exit of the manhole 100 is larger than the maximum width F1 of the antenna device 10F (the diagonal length of the antenna device 10F), as shown in FIG. 18C.
  • the inner diameter R1 may be, for example, 600 mm.
  • the internal shape of the manhole 100 may be cylindrical or rectangular.
  • the manhole 100 may be made of FRP (Fiber-Reinforced Plastics) or may be made of resin (resin).
  • the manhole 100 may have a drain hole 107 formed on the bottom surface. Thereby, the rainwater which has invaded the manhole 100 can be permeated (drained) into the ground through the drain hole 107.
  • a through hole 106 may be formed on the side surface.
  • the through hole 106 is formed at a height in communication with the conduit 105 shown in FIG. 14 when the manhole 100 is buried in the ground. With this configuration, the communication cable 301 and the electric cable 302 can be drawn into the manhole 100 through the conduit 105 and the through hole 106.
  • the manhole 100 accommodates the antenna device 10F. Therefore, the manhole 100 may be referred to as an antenna device housing.
  • FIG. 19 is a diagram showing an example of the configuration of a demonstration experiment station according to the embedded antenna apparatus described below.
  • the demonstration experiment station was set up in a controlled environment where sufficient separation could be secured from where people can pass.
  • the configuration of the demonstration experiment station is as shown in FIG.
  • the specifications of the demonstration experiment station are the FDD-LTE system and the 1.5 GHz band (BAND 21).
  • the sensor unit of the measuring device is horizontal at each height
  • the scanning was in the direction, and the horizontal maximum value of the power density at each height was obtained as the measurement value.
  • the power density is reduced by increasing the height from the antenna element 13 to the surface (ground surface) of the manhole cover 102. That is, it was found that by adjusting the height of the legs 202, the electromagnetic field intensity of the radio wave can be adjusted so as to satisfy the condition of the radio wave protection guideline.
  • the wireless device 300 of the antenna device 10F housed in the manhole 100 may be provided with a cooling unit for suppressing the high temperature of the wireless device 300.
  • the wireless device 300 may be covered with a cooling unit (housing) having water or coolant inside.
  • a cooling unit (sheet) for blocking external heat may be attached to the manhole cover 102.
  • the antenna device 10F housed in the manhole 100 may have two or more wireless devices 300 attached.
  • a wireless device for LTE and / or 5G and a wireless device (for example, a LoRa master device) for Low Power, Wide Area (LPWA) may be attached to the antenna device 10F housed in the manhole 100.
  • LPWA Low Power, Wide Area
  • the antenna device 10F according to the seventh embodiment is an underground buried antenna device 10F disposed below the manhole cover 102, and the antenna element 13 and the antenna element 13 are provided. And an installation table (201, 208) having a height adjustment mechanism (204, 205) for adjusting the distance from the manhole cover 102 to the manhole cover 102.
  • This enables adjustment that meets radio wave protection guidelines and adjustment of the communication area.
  • two antenna elements may be installed in the installation stand so that the distance between the two antenna elements can be adjusted.
  • the antenna element may extend from the installation stand in a direction approaching the manhole cover.
  • the radio base station according to the seventh embodiment is provided with the antenna device 10F described above and the antenna device 10F, is connected to the antenna element 13 by a cable, and receives a signal transmitted from the antenna device 10F and the antenna device 10F. And a wireless device 300 that performs wireless processing on the received signal.
  • the cable length connecting the wireless device 300 and the antenna element 13 can be shortened, and signal attenuation in the cable can be suppressed.
  • the radio apparatus 300 and the antenna device 10F can be accommodated integrally (that is, as a radio base station) in the manhole 100, so installation and maintenance of the radio base station are facilitated.
  • the stand may also have hooks 251 that hold the cables (301, 302) that are connected to the wireless device 300 from the backhaul.
  • the antenna device housing when installed in the ground, the upper surface which is the surface closest to the ground surface is opened, and the container (100) capable of containing the above-mentioned antenna device 10F; A lid (102) formed by Reinforced Plastics and covering the opening of the container. Thereby, high weighting strength can be obtained without affecting the radio wave propagation of the housed antenna device 10F.
  • a drain hole (107) may be formed on the lower surface, and a through hole (106) may be formed on the side surface. Thereby, the rainwater which has entered the manhole 100 can be drained. Also, the backhaul cables (301, 302) can be pulled into the container and connected to the wireless device 300.
  • the number of antenna elements 13 may be one, or three or more.
  • Reference Signs List 10 10A, 10B, 10C, 10D, 10F Antenna device 11 Support portion 12, 12B, 12C, 12D, 12E Antenna base 13 Antenna element 14 Antenna angle adjustment mechanism 15 Antenna height adjustment mechanism 16 Connector cable 20 Base 21 Leg Reference Signs List 22 post 23 height adjustment tool 24 intermediate member 25A, 25B, 25C buffer portion 26 rod 31 tube portion 32 fixture 33 annular portion 34 tube portion 35 reinforcing plate 36 bracket 41 first post 42 second post 46 stopper 47 pin 51 Strut 52 Intermediate member 61 Handle portion 62 Shaft portion 63 Bearing portion 64 Guide portion 71 Handle portion 100 Manhole (handhole) 102 Manhole Cover 106 Through Hole 107 Water Drain Hole 201 Bottom Frame 202 Leg 203 Grounding Section 204 Rod 205 Adjustment Tool 207 Column 208 Upper Frame 210 Hole 240 Device Mounting Plate 250 Handle 251 Hook 300 Radio Device 301 Communication Cable 302 Electrical Cable

Abstract

An underground-embedded type antenna device for placement under a lid has a configuration provided with an antenna element and a mount base on which the antenna element is installed, and which includes a height adjustment mechanism for adjusting the distance between the antenna element and the lid.

Description

アンテナ装置、無線基地局、及び、アンテナ装置収容体Antenna device, wireless base station, and antenna device housing
　本発明は、アンテナ装置、無線基地局、及び、アンテナ装置収容体に関する。 The present invention relates to an antenna device, a wireless base station, and an antenna device housing.
　従来、ビル、マンション又は電柱等が多く存在するエリアでは、これらの建設物上に無線基地局を設置し、このような建設物が存在しないエリア（例えば公園又は競技場周辺）では、鉄塔状の無線基地局を設置している。しかし、このような建設物が存在しないエリアでは景観への配慮が必要な場合も多く、無線基地局を目立たなく設置することが求められている。 Conventionally, in areas where there are many buildings, condominiums, power poles, etc., a radio base station is installed on these constructions, and in areas where such constructions do not exist (for example, around parks or stadiums) A wireless base station is installed. However, in areas where such constructions do not exist, it is often necessary to take into consideration the landscape, and it is required to install the wireless base station inconspicuously.
　無線基地局を目立たなく設置する従来技術として、マンホールに無線基地局を設置するマンホール型アンテナが知られている（特許文献１）。 As a prior art which installs a radio | wireless base station inconspicuously, the manhole type | mold antenna which installs a radio | wireless base station in a manhole is known (patent document 1).
特開平５－２２７０７３号公報Unexamined-Japanese-Patent No. 5-227073
　マンホール型アンテナの場合、人体とアンテナ素子との距離が近くなるため、通信エリアを広げるために電波の電界強度を強くすると、規定の電波防護指針を満たさなくなるおそれがある。しかし、従来技術のマンホール型アンテナは、電波防護指針を考慮していない。 In the case of the manhole antenna, since the distance between the human body and the antenna element becomes short, if the electric field strength of the radio wave is increased to widen the communication area, the defined radio wave protection guideline may not be satisfied. However, the prior art manhole antenna does not consider radio wave protection guidelines.
　本発明の目的は、電波防護指針を満たすための調整が可能な地下埋没型のアンテナ装置を提供することにある。 An object of the present invention is to provide a buried underground antenna device that can be adjusted to meet radio wave protection guidelines.
　本発明の一態様に係るアンテナ装置は、蓋の下に配置される地下埋没型のアンテナ装置であって、アンテナ素子と、前記アンテナ素子が設置されており、前記アンテナ素子から前記蓋までの距離を調整する高さ調整機構を有する設置台と、を備える。 An antenna device according to an aspect of the present invention is a buried underground antenna device disposed under a lid, and an antenna element and the antenna element are provided, and a distance from the antenna element to the lid And a mounting base having a height adjustment mechanism for adjusting
　本発明によれば、地下埋没型のアンテナ装置に、電波防護指針を満たすための調整を行うことができる。 According to the present invention, the underground buried type antenna device can be adjusted to satisfy the radio wave protection guideline.
実施の形態１に係るアンテナ装置の概要を示す図である。FIG. 1 is a diagram showing an outline of an antenna device according to Embodiment 1; 実施の形態１に係るアンテナ角度調整機構の説明図である。5 is an explanatory view of an antenna angle adjustment mechanism according to Embodiment 1. FIG. ２つのアンテナ素子の電波放射パターンのシミュレーション結果を示す図である。It is a figure which shows the simulation result of the electromagnetic wave radiation pattern of two antenna elements. ２つのアンテナ素子の電波放射パターンのシミュレーション結果を示す図である。It is a figure which shows the simulation result of the electromagnetic wave radiation pattern of two antenna elements. ２つのアンテナ素子の電波放射パターンのシミュレーション結果を示す図である。It is a figure which shows the simulation result of the electromagnetic wave radiation pattern of two antenna elements. 実施の形態２に係るアンテナ装置の側面断面図である。FIG. 7 is a side cross-sectional view of the antenna device according to Embodiment 2. 実施の形態２に係るアンテナ装置の中間部材の平面図である。FIG. 13 is a plan view of an intermediate member of the antenna device according to Embodiment 2. 実施の形態３に係るアンテナ装置の側面断面図である。FIG. 16 is a side cross-sectional view of the antenna device according to Embodiment 3. 実施の形態４に係るアンテナ装置の側面断面図である。FIG. 16 is a side cross-sectional view of the antenna device according to the fourth embodiment. 実施の形態５に係るアンテナ装置の側面断面図である。FIG. 21 is a side cross-sectional view of the antenna device according to the fifth embodiment. 実施の形態６に係るアンテナ装置の斜視図である。FIG. 21 is a perspective view of an antenna device according to a sixth embodiment. 実施の形態７に係るアンテナ装置の斜視図である。FIG. 21 is a perspective view of an antenna device according to a seventh embodiment. 実施の形態７に係るアンテナ装置の平面図である。FIG. 21 is a plan view of an antenna device according to a seventh embodiment. 実施の形態７に係るアンテナ装置の側面図である。FIG. 21 is a side view of the antenna device according to the seventh embodiment. 実施の形態７に係るアンテナ素子の間隔を変えたアンテナ装置の斜視図である。FIG. 21 is a perspective view of the antenna device in which the distance between the antenna elements according to the seventh embodiment is changed. 実施の形態７に係る無線装置を設置したアンテナ装置の斜視図である。FIG. 21 is a perspective view of an antenna device in which the wireless device according to the seventh embodiment is installed. 実施の形態７に係るアンテナ装置の無線装置の設置部分を説明するための図である。FIG. 24 is a diagram for describing a portion where the wireless device of the antenna device according to Embodiment 7 is installed. 実施の形態７に係るマンホールの側面の断面図の例を示す図である。FIG. 21 is a diagram showing an example of a cross-sectional view of a side surface of a manhole according to a seventh embodiment. 実施の形態７に係るマンホールの平面図の例を示す図である。FIG. 21 is a diagram showing an example of a plan view of a manhole according to a seventh embodiment. 実施の形態７に係るマンホールのＡ－Ａ’断面図の例を示す図である。FIG. 21 is a view showing an example of a cross section taken along the line A-A ′ of a manhole according to a seventh embodiment. 実施の形態７に係る実証実験局の構成例を示す図である。FIG. 21 is a diagram showing an example of configuration of a demonstration experiment station according to a seventh embodiment.
　以下、図面を参照しながら、実施の形態を説明する。 Hereinafter, embodiments will be described with reference to the drawings.
　（実施の形態１）
　＜アンテナ装置の概要＞
　まず、図１を参照しながら、地下埋没型のアンテナ装置１０の概要について説明する。 Embodiment 1
<Overview of Antenna Device>
First, the outline of the underground buried type antenna device 10 will be described with reference to FIG.
　アンテナ装置１０は、地面２の下に形成されたマンホール１００に設置される。マンホール１００の側面には側壁部１０１が設けられている。マンホール蓋１０２は、側壁部１０１の地表面５側の縁部１０３に形成されている溝にはめ込まれ、マンホール１００を塞ぐ。 The antenna device 10 is installed in a manhole 100 formed under the ground 2. Side walls 101 are provided on the side surfaces of the manhole 100. The manhole cover 102 is inserted into a groove formed in an edge portion 103 of the side wall portion 101 on the ground surface 5 side to close the manhole 100.
　マンホール１００は、地下に埋没された上下水道管又はガス管等の配管、通信ケーブルの配線、又は、電気ケーブルの配電等を管理するために、人が地上から出入りできるように地面２の下に形成された縦穴である。ただし、アンテナ装置１０が設置されるマンホール１００は、必ずしも人が出入りできるような大きさである必要はなく、いわゆるハンドホールのように、人が出入りできない大きさの穴であってもよい。また、アンテナ装置１０は、既存の設備のためのマンホール１００（又はハンドホール）に設置されても良いし、当該アンテナ装置１０のために新たに形成された穴（又は窪み等）に設置されてもよい。すなわち、アンテナ装置１０は、地面２の下に形成されたどのような穴に設置されてもよい。よって、マンホール蓋１０２も、地面２の下に形成された穴を塞ぐための蓋の一例に過ぎず、どのような蓋であってもよい。 The manhole 100 is located under the ground 2 so that a person can enter and exit from the ground in order to control piping such as water and sewage pipes or gas pipes buried in the ground, wiring of communication cables, or distribution of electric cables, etc. It is a formed vertical hole. However, the manhole 100 in which the antenna device 10 is installed does not necessarily have to be large enough for people to go in and out, and may be a hole the size in which people can not go in and out like a so-called handhole. Also, the antenna device 10 may be installed in a manhole 100 (or hand hole) for existing equipment, or installed in a hole (or recess etc.) newly formed for the antenna device 10 It is also good. That is, the antenna device 10 may be installed in any hole formed below the ground 2. Accordingly, the manhole cover 102 is also merely an example of a cover for closing a hole formed under the ground 2, and may be any cover.
　アンテナ装置１０は、図１のように、マンホール１００内の地面に置かれる。又は、アンテナ装置１０は、マンホール１００内に吊り下げられるように設置されてもよい。この場合、アンテナ装置１０は、腕部（図示せず）を備え、当該腕部が、側壁部１０１の縁部１０３に引っかけられる。 The antenna device 10 is placed on the ground in the manhole 100 as shown in FIG. Alternatively, the antenna device 10 may be installed so as to be suspended in the manhole 100. In this case, the antenna device 10 includes an arm (not shown), and the arm is hooked to the edge 103 of the side wall 101.
　アンテナ装置１０は、支持部１１、アンテナ台１２、アンテナ素子１３、アンテナ角度調整機構１４及びアンテナ高調整機構１５を備える。 The antenna device 10 includes a support 11, an antenna mount 12, an antenna element 13, an antenna angle adjustment mechanism 14, and an antenna height adjustment mechanism 15.
　支持部１１は、アンテナ高調整機構１５を介して、アンテナ台１２を支持する。アンテナ台１２は、アンテナ角度調整機構１４を介して、アンテナ素子１３を保持する。 The support portion 11 supports the antenna mount 12 via the antenna height adjustment mechanism 15. The antenna stand 12 holds the antenna element 13 via the antenna angle adjustment mechanism 14.
　アンテナ素子１３は、コネクタケーブル１６を介して、基地局の本体と接続し、携帯端末４との間で、電波を送受信する。当該基地局は、例えば、無線ＬＡＮ（Ｗｉ－Ｆｉ）の基地局、又は、ＬＴＥ若しくは５Ｇ等の基地局である。 The antenna element 13 is connected to the base station via the connector cable 16 and transmits and receives radio waves to and from the portable terminal 4. The base station is, for example, a wireless LAN (Wi-Fi) base station or a base station such as LTE or 5G.
　アンテナ角度調整機構１４は、アンテナ素子１３の角度を調整する。なお、アンテナ角度調整機構１４の詳細については後述する。アンテナ高調整機構１５は、アンテナ台１２の高さ（マンホール蓋１０２までの距離）を調整する。なお、アンテナ高調整機構１５の調整例については後述する。 The antenna angle adjustment mechanism 14 adjusts the angle of the antenna element 13. The details of the antenna angle adjustment mechanism 14 will be described later. The antenna height adjustment mechanism 15 adjusts the height (the distance to the manhole cover 102) of the antenna stand 12. An adjustment example of the antenna height adjustment mechanism 15 will be described later.
　＜電波防護指針＞
　次に、電波防護指針について説明する。 Radio wave protection guidelines
Next, radio wave protection guidelines will be described.
　電波防護指針では、人体が存在する場所に対して、例えば「電力密度の全測定点の平均が１０００μＷ／ｃｍ２を超えないこと」及び「電力密度の全測定点の何れも２０００μＷ／ｃｍ２を超えないこと」という条件が規定されている。 In the radio wave protection guidelines, for example, “average of all measurement points of power density does not exceed 1000 μW / cm 2 ” and “all measurement points of power density are both 2000 μW / cm 2 The condition that "do not exceed" is defined.
　従来のように、高所に無線基地局を設置する場合には、人体（ユーザ）３とアンテナ装置１０との距離が比較的遠いので、電波防護指針の条件を満たしつつ、所望の通信距離（又は通信エリア）を得ることはそれほど難しくはない。しかしながら、地下埋没型のアンテナ装置１０の場合は、図１に示すように、人体３がアンテナ装置１０の真上を通過することもあり、人体３とアンテナ装置１０との距離が比較的近いので、電波防護指針の条件を満たしつつ、極力、通信距離を長くするためには、微妙な調整が必要となる。 As in the prior art, when the radio base station is installed at a high place, since the distance between the human body (user) 3 and the antenna device 10 is relatively long, the desired communication distance ( Or to obtain a communication area) is not so difficult. However, in the case of the underground buried type antenna device 10, as shown in FIG. 1, the human body 3 may pass just above the antenna device 10, and the distance between the human body 3 and the antenna device 10 is relatively short. In order to lengthen the communication distance as much as possible while satisfying the conditions of the radio wave protection guidelines, delicate adjustments are required.
　そこで、本実施の形態では、このような調整を設置現場で容易に行えるように、アンテナ角度調整機構１４及びアンテナ高調整機構１５を備えているアンテナ装置１０を提供する。 Therefore, in the present embodiment, the antenna device 10 including the antenna angle adjustment mechanism 14 and the antenna height adjustment mechanism 15 is provided so that such adjustment can be easily performed at the installation site.
　＜アンテナ高調整機構＞
　次に、アンテナ高調整機構１５によるアンテナ高の調整例について説明する。 <Antenna height adjustment mechanism>
Next, an adjustment example of the antenna height by the antenna height adjustment mechanism 15 will be described.
　例えば、測定された電力密度が電波防護指針の条件を超える場合、アンテナ高調整機構１５によって、アンテナ素子１３からマンホール蓋１０２までの距離を遠くする（つまり地表面５から離す）。これにより、当該アンテナ装置１０の上方の測定点における電磁界強度を弱めることができる。 For example, when the measured power density exceeds the condition of the radio wave protection guideline, the distance from the antenna element 13 to the manhole cover 102 is increased (that is, separated from the ground surface 5) by the antenna height adjustment mechanism 15. Thereby, the electromagnetic field intensity at the measurement point above the antenna device 10 can be weakened.
　一方、測定された電力密度が電波防護指針の条件を十分に満たしている場合、アンテナ高調整機構１５によって、アンテナ素子１３からマンホール蓋１０２までの距離を近くする（つまり地表面５に近づける）。これにより、当該アンテナ装置１０の上方の測定点における電磁界強度を強め、通信距離を長くすることができる。なお、アンテナ高調整機構１５の具体的な構成例については、実施の形態２から６で説明する。 On the other hand, when the measured power density sufficiently satisfies the condition of the radio wave protection guideline, the distance from the antenna element 13 to the manhole cover 102 is reduced by the antenna height adjusting mechanism 15 (that is, it approaches the ground surface 5). Thereby, the electromagnetic field intensity at the measurement point above the antenna device 10 can be intensified, and the communication distance can be extended. A specific configuration example of the antenna height adjustment mechanism 15 will be described in the second to sixth embodiments.
　＜アンテナ角度調整機構＞
　次に、図２（Ａ）及び図２（Ｂ）を参照しながら、アンテナ角度調整機構１４について説明する。 <Antenna angle adjustment mechanism>
Next, the antenna angle adjustment mechanism 14 will be described with reference to FIGS. 2 (A) and 2 (B).
　アンテナ角度調整機構１４は、図２（Ａ）に示すように、アンテナ素子１３をアンテナ台１２の主面に対して水平方向に９０度回転可能とし、図２（Ｂ）に示すように、アンテナ素子１３をアンテナ台１２の主面に対して垂直方向に９０度回転可能とする機構である。 The antenna angle adjustment mechanism 14 enables the antenna element 13 to be rotated by 90 degrees in the horizontal direction with respect to the main surface of the antenna base 12 as shown in FIG. 2 (A), and as shown in FIG. 2 (B) This is a mechanism that allows the element 13 to be rotated 90 degrees in the vertical direction with respect to the main surface of the antenna stand 12.
　また、図２（Ａ）及び図２（Ｂ）に示すように、アンテナ素子１３が垂直方向に回転でき、かつ、アンテナ素子１３から延びるコネクタケーブル１６がアンテナ台１２の下に通ずるように、アンテナ台１２におけるアンテナ角度調整機構１４の下部近傍には、穴１７が形成されている。穴１７の形状は、例えば、中心角が９０度の扇形である。 Also, as shown in FIGS. 2A and 2B, the antenna can be rotated in the vertical direction, and the antenna cable 13 extending from the antenna element 13 can pass under the antenna base 12 as shown in FIG. A hole 17 is formed in the vicinity of the lower portion of the antenna angle adjustment mechanism 14 in the pedestal 12. The shape of the hole 17 is, for example, a fan shape having a central angle of 90 degrees.
　なお、アンテナ素子１３は、アンテナケースに収納され、外からの粉塵及び雨水等から保護される。この場合、アンテナ角度調整機構１４は、アンテナ素子１３を収納しているアンテナケースを回転可能とする機構であってもよい。 The antenna element 13 is housed in an antenna case and protected from external dust and rain water. In this case, the antenna angle adjustment mechanism 14 may be a mechanism that allows the antenna case housing the antenna element 13 to be rotatable.
　次に、図３から図５を参照しながら、アンテナ台１２に設置された２つのアンテナ素子（スリーブアンテナ）１３の角度を調整したときの電波放射パターン（シミュレーション結果）について説明する。なお、図３から図５に示す複数の電波放射パターンは、それぞれ、電波の周波数が１．５ＧＨｚ、１．８ＧＨｚ、２ＧＨｚ、及び、３．５ＧＨｚの場合のものである。 Next, radio wave radiation patterns (simulation results) when the angles of the two antenna elements (sleeve antennas) 13 installed on the antenna stand 12 are adjusted will be described with reference to FIGS. 3 to 5. The plurality of radio wave radiation patterns shown in FIG. 3 to FIG. 5 are for radio waves of 1.5 GHz, 1.8 GHz, 2 GHz, and 3.5 GHz, respectively.
　図３は、配置Ｇ１に示すように２つのアンテナ素子１３を３００ｍｍ離して、２つのアンテナ素子１３の主軸がＸ軸と平行となるように角度を調整した場合における、アンテナ素子１３からＺ軸方向に１３０ｍｍ離れた位置での電波放射パターンを示す。 FIG. 3 shows the arrangement G1 in which the two antenna elements 13 are separated by 300 mm, and the angle is adjusted so that the main axes of the two antenna elements 13 become parallel to the X axis. Shows a radio wave radiation pattern at a distance of 130 mm.
　図４は、配置Ｇ２に示すように２つのアンテナ素子１３を３００ｍｍ離して、２つのアンテナ素子１３の主軸がＺ軸と平行となるように角度を調整した場合における、アンテナ素子１３からＺ軸方向に１００ｍｍ離れた位置での電波放射パターンを示す。 FIG. 4 shows the arrangement G2 in which two antenna elements 13 are separated by 300 mm, and the angle is adjusted so that the main axes of the two antenna elements 13 are parallel to the Z axis. Shows a radio wave radiation pattern at a distance of 100 mm.
　図５は、配置Ｇ３に示すように２つのアンテナ素子１３を３００ｍｍ離して、一方のアンテナ素子１３の主軸がＸ軸と平行となるように、他方のアンテナ素子１３の主軸がＺ軸と平行となるように角度を調整した場合における、アンテナ素子１３からＺ軸方向に１３０ｍｍ離れた位置での電波放射パターンを示す。 In FIG. 5, as shown in the arrangement G3, the two antenna elements 13 are separated by 300 mm, and the main axis of the other antenna element 13 is parallel to the Z axis so that the main axis of one antenna element 13 is parallel to the X axis. The radio wave radiation pattern at a position 130 mm away from the antenna element 13 in the Z-axis direction when the angle is adjusted to be
　図３から図５において、ＹＺ面の図は、横軸がＹ軸方向を示し、縦軸がＺ軸方向を示す。ＺＸ面の図は、横軸がＸ軸方向を示し、縦軸がＺ軸方向を示す。ＸＹ面の図は、横軸がＹ軸方向を示し、縦軸がＸ軸方向を示す。 In FIGS. 3 to 5, in the YZ plane, the horizontal axis indicates the Y-axis direction, and the vertical axis indicates the Z-axis direction. In the ZX plane, the horizontal axis indicates the X axis direction, and the vertical axis indicates the Z axis direction. In the XY plane, the horizontal axis indicates the Y-axis direction, and the vertical axis indicates the X-axis direction.
　図３から図５の全てのＹＺ面及びＺＸ面の電波放射パターンを参照すると、アンテナ素子１３からＺ軸方向に離れるほど、電波の電界強度が弱くなることがわかる。また、電波の周波数が異なってもこの傾向は同じであることがわかる。 Referring to all the radio wave radiation patterns of the YZ plane and the ZX plane in FIGS. 3 to 5, it can be seen that the electric field intensity of the radio wave becomes weaker as the antenna element 13 moves further in the Z axis direction. Also, it can be seen that this tendency is the same even if the radio wave frequency is different.
　また、図３から図５のＸＹ面の電波放射パターンを比較すると、アンテナ装置１０の中心からＸ軸方向及びＹ軸方向に満遍なく広い通信エリアを形成する場合には、２つのアンテナ素子１３のアンテナ軸がＺ軸と平行となるように、アンテナ角度調整機構１４を調整することが好ましいことがわかる。 Further, comparing the radio wave radiation patterns of the XY plane in FIGS. 3 to 5, when forming a wide communication area in the X-axis direction and the Y-axis direction from the center of the antenna device 10, the antennas of the two antenna elements 13 It can be seen that it is preferable to adjust the antenna angle adjustment mechanism 14 so that the axis is parallel to the Z axis.
　ただし、上記の図３から図５は、あくまでアンテナ素子１３の角度を変えると電波放射パターンが変化することを示すためのものであり、図３から図５のシミュレーション結果は、発明を何ら限定するものではない。 However, FIGS. 3 to 5 above show that the radio wave radiation pattern changes when the angle of the antenna element 13 is changed to the last, and the simulation results of FIGS. 3 to 5 limit the invention in any way. It is not a thing.
　＜実施の形態１のまとめ＞
　以上のように、実施の形態１では、地下埋没型のアンテナ装置１０が、アンテナ素子１３の角度を調整するアンテナ角度調整機構１４と、アンテナ台１２の高さを調整するアンテナ高調整機構１５とを備える。これにより、作業者は、アンテナ装置１０の設置現場において、電波防護指針の条件を満たしつつ、極力、通信距離を長くするための調整を、容易に行うことができる。 <Summary of Embodiment 1>
As described above, in the first embodiment, the underground buried antenna device 10 includes the antenna angle adjustment mechanism 14 for adjusting the angle of the antenna element 13 and the antenna height adjustment mechanism 15 for adjusting the height of the antenna base 12. Equipped with As a result, the operator can easily perform adjustment for extending the communication distance as much as possible while satisfying the conditions of the radio wave protection guideline at the installation site of the antenna device 10.
　（実施の形態２）
　＜アンテナ装置の構成＞
　次に、図６及び図７を参照しながら、実施の形態２に係るアンテナ装置１０Ａの構成について説明する。図６は、アンテナ装置１０Ａの側面断面図であり、図７は、アンテナ装置１０Ａの構成要素である中間部材２４を上から見た平面図である。なお、実施の形態１と共通する構成部分には同一符号を付して説明を省略する。 Second Embodiment
<Configuration of Antenna Device>
Next, the configuration of the antenna device 10A according to the second embodiment will be described with reference to FIGS. 6 and 7. 6 is a side sectional view of the antenna device 10A, and FIG. 7 is a plan view of the intermediate member 24 which is a component of the antenna device 10A as viewed from above. The same components as in the first embodiment will be assigned the same reference numerals and descriptions thereof will be omitted.
　アンテナ装置１０Ａは、アンテナ装置１０と同様に、アンテナ台１２、アンテナ素子１３及びアンテナ角度調整機構１４を備える。また、アンテナ装置１０Ａは、さらに、台座２０、脚部２１、支柱２２、高さ調整具２３、中間部材２４及び緩衝部２５Ａを備える。 Similar to the antenna device 10, the antenna device 10A includes an antenna base 12, an antenna element 13, and an antenna angle adjustment mechanism 14. The antenna device 10A further includes a pedestal 20, a leg 21, a support 22, a height adjustment tool 23, an intermediate member 24, and a buffer 25A.
　アンテナ装置１０Ａにおける台座２０、脚部２１及び支柱２２は、アンテナ装置１０の支持部１１の一例に相当する。アンテナ装置１０Ａにおける高さ調整具２３及び中間部材２４は、アンテナ高調整機構１５の一例に相当する。また、高さ調整具２３は、アンテナ台１２の取り付け位置を決める位置決め部と呼ばれてもよい。 The pedestal 20, the legs 21, and the support 22 in the antenna device 10A correspond to an example of the support portion 11 of the antenna device 10. The height adjustment tool 23 and the intermediate member 24 in the antenna device 10A correspond to an example of the antenna height adjustment mechanism 15. Moreover, the height adjustment tool 23 may be called a positioning part which determines the attachment position of the antenna stand 12.
　台座２０は、下面に複数の脚部２１が備えられ、マンホール１００内の地面に脚部２１が接地されることにより、当該地面に対して水平に配置される。 The pedestal 20 is provided with a plurality of legs 21 on the lower surface, and is disposed horizontally to the ground by the legs 21 being grounded to the ground in the manhole 100.
　支柱２２は、台座２０に対して垂直に固定されており、上方へ延びている。図６は、支柱２２が４本の例を示している。ただし、本実施の形態では、これに限られず、支柱２２の数は、２本以上であれば何本であってもよい。 The columns 22 are vertically fixed to the pedestal 20 and extend upward. FIG. 6 shows an example in which four columns 22 are provided. However, the present embodiment is not limited to this, and the number of posts 22 may be any number as long as it is two or more.
　高さ調整具２３は、支柱２２の任意の位置（高さ）に取り付け可能な器具である。高さ調整具２３は、筒部３１と、固定具３２とにより構成される。筒部３１の内径は、支柱２２の外径よりも大きい。筒部３１には、支柱２２が挿入される。固定具３２は、例えば、ねじである。固定具３２（ねじ）を締めると、筒部３１が支柱２２に固定される。固定具３２（ねじ）を緩めると、筒部３１が支柱２２に沿って上下方向に移動可能となる。ただし、固定具３２は、ねじ式に限らず、プッシュ式又はスライド式等であってもよい。なお、固定具３２は、支柱２２の軸に対して垂直方向に突出する構造の場合、アンテナ装置１０Ａをマンホール１００に設置する際に邪魔にならないように、マンホール１００の中心方向に（つまり内向きに）突出するよう配置されることが好ましい。 The height adjustment tool 23 is a device that can be attached to any position (height) of the support 22. The height adjustment tool 23 is configured of a cylindrical portion 31 and a fixing tool 32. The inner diameter of the cylindrical portion 31 is larger than the outer diameter of the support 22. The column 22 is inserted into the cylindrical portion 31. The fixture 32 is, for example, a screw. When the fixing tool 32 (screw) is tightened, the tube portion 31 is fixed to the support 22. When the fixing tool 32 (screw) is loosened, the cylindrical portion 31 can move up and down along the support 22. However, the fixing tool 32 is not limited to the screw type, and may be a push type or a slide type. In the case of a structure in which the fixing tool 32 protrudes in a direction perpendicular to the axis of the support column 22, the fixing device 32 is directed in the center direction of the manhole 100 (that is, inward) so as not to interfere with installation of the antenna device 10A in the manhole 100. Is preferably arranged to protrude.
　中間部材２４は、図７に示すように、円環部３３、筒部３４、補強板３５及びブラケット３６により構成される。円環部３３は、円環形状であり、その直径は、マンホール１００の直径よりも小さく、アンテナ台１２の直径よりも大きい。筒部３４の内径は、支柱２２の外径よりも大きい。筒部３４は、円環部３３の内側に溶接される。筒部３４の数は、支柱２２の数と同じである。補強板３５は、２本の板が円環部３３の中心点でクロスするように溶接されている。さらに、補強板３５は、端部において、筒部３４に溶接されている。ブラケット３６は、補強板３５に、筒部３４の付近で溶接されている。また、ブラケット３６には、取付穴３７が形成されている。 As shown in FIG. 7, the intermediate member 24 is configured by an annular portion 33, a cylindrical portion 34, a reinforcing plate 35 and a bracket 36. The annular portion 33 has an annular shape, and the diameter thereof is smaller than the diameter of the manhole 100 and larger than the diameter of the antenna base 12. The inner diameter of the cylindrical portion 34 is larger than the outer diameter of the support 22. The cylindrical portion 34 is welded to the inside of the annular portion 33. The number of cylindrical portions 34 is the same as the number of columns 22. The reinforcing plate 35 is welded so that the two plates cross at the center point of the annular portion 33. Furthermore, the reinforcing plate 35 is welded to the cylindrical portion 34 at the end. The bracket 36 is welded to the reinforcing plate 35 in the vicinity of the cylindrical portion 34. Further, mounting holes 37 are formed in the bracket 36.
　図６に示すように、中間部材２４は、高さ調整具２３よりも上方に配置される。すなわち、中間部材２４の各筒部３４には、各支柱２２が挿入される。なお、中間部材２４を、単なる平板とせずに、補強板３５で補強しているのは、中間部材２４に雨水等が溜まらないようにするためである。 As shown in FIG. 6, the intermediate member 24 is disposed above the height adjustment tool 23. That is, the columns 22 are inserted into the cylindrical portions 34 of the intermediate member 24. The reason why the intermediate member 24 is reinforced by the reinforcing plate 35 instead of a simple flat plate is to prevent rainwater and the like from being collected in the intermediate member 24.
　緩衝部２５Ａは、中間部材２４のブラケット３６の取付穴３７の部分に、ねじ等で固定される。図６では、緩衝部２５Ａが４つの例を示している。ただし、本実施の形態では、これに限られず、緩衝部２５Ａの数は、３つ以上であれば幾つであってもよい。また、図６では、緩衝部２５Ａが、バネである場合を示しているが、本実施の形態では、これに限られず、緩衝部２５Ａは、ゴム又はクッション等でもよい。 The buffer portion 25A is fixed to a portion of the mounting hole 37 of the bracket 36 of the intermediate member 24 by a screw or the like. FIG. 6 shows four examples of the buffer unit 25A. However, the present embodiment is not limited to this, and the number of buffer portions 25A may be any number as long as it is three or more. Although FIG. 6 shows the case where the buffer portion 25A is a spring, the present embodiment is not limited to this, and the buffer portion 25A may be rubber, a cushion or the like.
　アンテナ台１２の座面には、４本のロッド２６が溶接される。また、緩衝部２５Ａがブラケット３６に載置された状態で、ロッド２６が、緩衝部２５Ａ及び取付穴３７に挿入される。そして、ロッド２６の先端側からナットがストッパとして取り付けられる。これにより、アンテナ台１２が、中間部材２４に固定され、緩衝部２５Ａの付勢力により、高さ方向に位置決めされる。 Four rods 26 are welded to the seat surface of the antenna base 12. The rod 26 is inserted into the buffer portion 25A and the mounting hole 37 in a state where the buffer portion 25A is placed on the bracket 36. Then, a nut is attached as a stopper from the tip end side of the rod 26. Thereby, the antenna stand 12 is fixed to the intermediate member 24, and is positioned in the height direction by the biasing force of the buffer portion 25A.
　アンテナ装置１０Ａの構成によれば、高さ調整具２３の位置を変えることにより、中間部材２４、緩衝部２５Ａ及びアンテナ台１２の位置（高さ）を変えることができる。 According to the configuration of the antenna device 10A, by changing the position of the height adjustment tool 23, the positions (heights) of the intermediate member 24, the buffer portion 25A, and the antenna base 12 can be changed.
　具体的には、高さ調整具２３を下方に移動させることにより、アンテナ台１２の位置を下方（マンホール蓋１０２から離れる方向）に移動させることができる。反対に、高さ調整具２３を上方に移動させることにより、アンテナ台１２の位置を上方（マンホール蓋１０２に近づく方向）に移動させることができる。これにより、作業者は、アンテナ装置１０Ａの設置現場で、電波防護指針の条件を満たすように、電波の電磁界強度を調整することができる。 Specifically, by moving the height adjustment tool 23 downward, the position of the antenna base 12 can be moved downward (in a direction away from the manhole cover 102). Conversely, the position of the antenna base 12 can be moved upward (in the direction approaching the manhole cover 102) by moving the height adjustment tool 23 upward. Thereby, the worker can adjust the electromagnetic field intensity of the radio wave so as to satisfy the condition of the radio wave protection guideline at the installation site of the antenna device 10A.
　また、アンテナ台１２を緩衝部２５Ａの上に載置することにより、台座２０、支柱２２及び中間部材２４等が外部から受けた振動がアンテナ台１２に直接伝達することを、抑止することができる。これにより、外部からの振動によって、アンテナ台１２に設置されているアンテナ素子１３の位置（例えば角度）がずれたり、アンテナ素子１３のコネクタケーブル１６が抜けたりすること等を抑止することができる。 Further, by placing the antenna base 12 on the buffer portion 25A, it is possible to suppress that the vibration received from the outside by the pedestal 20, the support column 22, the intermediate member 24 and the like is transmitted directly to the antenna base 12 . As a result, it is possible to prevent the position (for example, the angle) of the antenna element 13 installed on the antenna stand 12 from shifting or the connector cable 16 of the antenna element 13 coming off due to vibration from the outside.
　なお、高さ調整具２３は、予め決められた幾つかの位置（高さ）にのみ固定する構成であってもよい。例えば、支柱２２の予め決められた位置に穴が形成され、筒部３１の側面に穴が形成され、固定具３２（ピン）を筒部３１の穴と支柱２２の穴に挿入する構成であってもよい。 The height adjustment tool 23 may be configured to be fixed only at some predetermined positions (heights). For example, a hole is formed at a predetermined position of the column 22, a hole is formed on the side surface of the cylinder 31, and the fixing tool 32 (pin) is inserted into the hole of the cylinder 31 and the hole of the column 22. May be
　＜実施の形態２のまとめ＞
　以上のように、実施の形態２では、地下埋没型のアンテナ装置１０Ａが、支柱２２に設けられた高さ調整具２３の上に中間部材２４を載置し、当該中間部材２４の上にアンテナ台１２を載置する構成を採る。これにより、作業員は、アンテナ装置１０Ａの設置現場において、高さ調整具２３の取付位置を簡単に変えることができるので、アンテナ台１２の高さを容易に調整することができる。 <Summary of Embodiment 2>
As described above, in the second embodiment, the underground buried antenna device 10A mounts the intermediate member 24 on the height adjustment tool 23 provided on the support 22, and the antenna on the intermediate member 24. A configuration for mounting the platform 12 is adopted. Thus, the worker can easily change the mounting position of the height adjustment tool 23 at the installation site of the antenna device 10A, so that the height of the antenna base 12 can be easily adjusted.
　（実施の形態３）
　＜アンテナ装置の構成＞
　次に、図８を参照しながら、実施の形態３に係るアンテナ装置１０Ｂの構成について説明する。図８は、アンテナ装置１０Ｂの側面断面図である。なお、図８のアンテナ装置１０Ｂにおいて、図６に示したアンテナ装置１０Ａと共通する構成部分には同一符号を付して説明を省略する。 Third Embodiment
<Configuration of Antenna Device>
Next, the configuration of the antenna device 10B according to the third embodiment will be described with reference to FIG. FIG. 8 is a side sectional view of the antenna device 10B. In addition, in the antenna apparatus 10B of FIG. 8, the same code | symbol is attached | subjected to the same component as the antenna apparatus 10A shown in FIG. 6, and description is abbreviate | omitted.
　アンテナ装置１０Ｂは、アンテナ装置１０Ａと同様に、アンテナ素子１３、アンテナ角度調整機構１４、台座２０及び脚部２１を備える。また、アンテナ装置１０Ｂは、アンテナ台１２Ｂ及び緩衝部２５Ｂを備える。アンテナ台１２Ｂは、アンテナ装置１０Ａのアンテナ台１２と比較して、中央にねじ穴４３が形成されている点が異なる。緩衝部２５Ｂは、アンテナ装置１０Ａの緩衝部２５Ａと比較して、貫通穴が形成されているばねである点が異なる。また、アンテナ装置１０Ｂは、第１支柱４１及び第２支柱４２を備える。 The antenna device 10 </ b> B includes the antenna element 13, the antenna angle adjustment mechanism 14, the pedestal 20, and the legs 21 similarly to the antenna device 10 </ b> A. The antenna device 10B also includes an antenna mount 12B and a buffer unit 25B. The antenna base 12B is different from the antenna base 12 of the antenna device 10A in that a screw hole 43 is formed at the center. The buffer portion 25B is different from the buffer portion 25A of the antenna device 10A in that it is a spring in which a through hole is formed. In addition, the antenna device 10B includes the first support post 41 and the second support post 42.
　アンテナ装置１０Ｂにおける台座２０、脚部２１、第１支柱４１及び第２支柱４２は、アンテナ装置１０の支持部１１の一例に相当する。アンテナ装置１０Ｂにおけるアンテナ台１２Ｂの中央に形成されているねじ穴４３、及び、第２支柱４２の少なくとも一部に切られているねじ溝４４は、アンテナ高調整機構１５の一例に相当する。 The pedestal 20, the legs 21, the first support post 41, and the second support post 42 in the antenna device 10B correspond to an example of the support portion 11 of the antenna device 10. The screw hole 43 formed in the center of the antenna base 12B in the antenna device 10B and the screw groove 44 cut in at least a part of the second support column 42 correspond to an example of the antenna height adjustment mechanism 15.
　第１支柱４１は、台座２０の上面中央に、当該台座２０の主面に対して垂直に固定されており、上方へ延びている。また、第１支柱４１には、当該第１支柱４１の主軸に対して垂直な面を有するストッパ４６が設けられている。 The first support column 41 is fixed to the center of the upper surface of the pedestal 20 perpendicularly to the main surface of the pedestal 20 and extends upward. Further, the first support post 41 is provided with a stopper 46 having a surface perpendicular to the main axis of the first support post 41.
　緩衝部２５Ｂは、中央部に貫通穴が形成されている。緩衝部２５Ｂは、当該貫通穴に第１支柱４１が挿入され、下端がストッパ４６に載置されている。 The buffer portion 25B is formed with a through hole at a central portion. The first support column 41 is inserted into the through hole, and the lower end of the buffer unit 25B is placed on the stopper 46.
　第２支柱４２は、第１支柱４１を挿入可能な筒状であり、当該第１支柱４１が当該筒内に挿入される。そして、第２支柱４２は、下端が緩衝部２５Ｂの上端に接した状態で、第１支柱４１に支持されている。 The second support column 42 has a tubular shape into which the first support column 41 can be inserted, and the first support column 41 is inserted into the cylinder. The second support post 42 is supported by the first support post 41 in a state in which the lower end is in contact with the upper end of the buffer portion 25B.
　また、第２支柱４２が第１支柱４１に対して回転しないように、第１支柱４１と第２支柱４２には、回転防止機構が設けられている。回転防止機構は、例えば、第１支柱４１に形成されている切欠（図示せず）に、第２支柱４２に取り付けられたピン４７を嵌める構成を採る。 In addition, the first support post 41 and the second support post 42 are provided with a rotation prevention mechanism so that the second support post 42 does not rotate with respect to the first support post 41. The rotation preventing mechanism adopts, for example, a configuration in which a pin 47 attached to the second support 42 is fitted in a notch (not shown) formed in the first support 41.
　アンテナ装置１０Ｂの構成によれば、アンテナ台１２Ｂのねじ穴４３と第２支柱４２のねじ溝４４とが螺合しているので、アンテナ台１２Ｂを回転させることにより、アンテナ台１２Ｂの高さを変えることができる。 According to the configuration of the antenna device 10B, since the screw hole 43 of the antenna base 12B and the screw groove 44 of the second support column 42 are screwed together, the height of the antenna base 12B can be increased by rotating the antenna base 12B. It can be changed.
　例えば、アンテナ台１２Ｂを時計回りに回転させることにより、アンテナ台１２Ｂの位置を下方（マンホール蓋１０２から離れる方向）に移動させることができる。反対に、アンテナ台１２Ｂを反時計回りに回転させることにより、アンテナ台１２Ｂの位置を上方（マンホール蓋１０２に近づく方向）に移動させることができる。これにより、アンテナ装置１０Ｂの設置現場で、電波防護指針の条件を満たすように、電波の電磁界強度を調整することができる。 For example, by rotating the antenna stand 12B clockwise, the position of the antenna stand 12B can be moved downward (in a direction away from the manhole cover 102). Conversely, the position of the antenna base 12B can be moved upward (in the direction approaching the manhole cover 102) by rotating the antenna base 12B counterclockwise. Thereby, the electromagnetic field intensity of the radio wave can be adjusted so as to satisfy the condition of the radio wave protection guideline at the installation site of the antenna device 10B.
　また、第１支柱４１と第２支柱４２との間に緩衝部２５Ｂを設けることにより、台座２０及び第１支柱４１が外部から受けた振動が、アンテナ台１２Ｂに直接伝達することを、抑止することができる。これにより、外部からの振動によって、アンテナ台１２Ｂに設置されているアンテナ素子１３の位置（例えば角度）がずれたり、アンテナ素子１３のコネクタケーブル１６が抜けたりすること等を、抑止することができる。 Further, by providing the buffer portion 25B between the first support column 41 and the second support column 42, the vibration received from the outside of the pedestal 20 and the first support column 41 is prevented from being directly transmitted to the antenna base 12B. be able to. Thereby, it is possible to prevent the position (for example, the angle) of the antenna element 13 installed on the antenna base 12B from being shifted or the connector cable 16 of the antenna element 13 coming off due to external vibration. .
　また、第２支柱４２には、高さ方向に目盛り（図示せず）が設けられてもよい。これにより、別途、測量器具を用いなくても、目視でアンテナ台１２Ｂの高さを確認することができる。すなわち、設置現場において、電波の電磁界強度の調整がさらに容易になる。 Further, the second support column 42 may be provided with a scale (not shown) in the height direction. Thereby, the height of the antenna stand 12B can be visually confirmed without using a survey instrument separately. That is, at the installation site, adjustment of the electromagnetic field strength of the radio wave is further facilitated.
　なお、本実施の形態において、アンテナ高調整機構１５を、アンテナ台１２Ｂのねじ穴４３及び第２支柱４２のねじ溝４４に代えて、他の構成としてもよい。例えば、第２支柱４２に、図６で説明した高さ調整具２３を取り付ける。そして、アンテナ台１２Ｂの中央に、ねじ穴に代えて貫通穴を形成し、当該貫通穴に第２支柱４２を挿入し、当該アンテナ台１２を高さ調整具２３に載置する。これによっても、高さ調整具２３の取り付け位置を調整することにより、アンテナ台１２Ｂの高さを調整することができる。 In the present embodiment, the antenna height adjustment mechanism 15 may be replaced with the screw hole 43 of the antenna base 12B and the screw groove 44 of the second support column 42, and may have another configuration. For example, the height adjustment tool 23 described in FIG. 6 is attached to the second support column 42. Then, a through hole is formed at the center of the antenna base 12 B instead of the screw hole, the second support column 42 is inserted into the through hole, and the antenna base 12 is placed on the height adjustment tool 23. Also by this, by adjusting the mounting position of the height adjustment tool 23, the height of the antenna base 12B can be adjusted.
　＜実施の形態３のまとめ＞
　以上のように、実施の形態３では、地下埋没型のアンテナ装置１０Ｂが、アンテナ台１２Ｂのねじ穴４３と、第２支柱４２のねじ溝４４とが螺合する構成を採る。これにより、作業員は、アンテナ装置１０Ｂの設置現場において、アンテナ台１２Ｂを回転させることで、アンテナ台１２Ｂの高さを容易に調整することができる。 <Summary of Embodiment 3>
As described above, in the third embodiment, the underground buried antenna device 10B has a configuration in which the screw hole 43 of the antenna base 12B and the screw groove 44 of the second support column 42 are screwed together. As a result, the worker can easily adjust the height of the antenna stand 12B by rotating the antenna stand 12B at the installation site of the antenna device 10B.
　（実施の形態４）
　＜アンテナ装置の構成＞
　次に、図９を参照しながら、実施の形態４に係るアンテナ装置１０Ｃの構成について説明する。図９は、アンテナ装置１０Ｃの側面断面図である。なお、図９のアンテナ装置１０Ｃにおいて、図８のアンテナ装置１０Ｂと共通する構成部分には同一符号を付して説明を省略する。 Embodiment 4
<Configuration of Antenna Device>
Next, the configuration of the antenna device 10C according to the fourth embodiment will be described with reference to FIG. FIG. 9 is a side sectional view of the antenna device 10C. In the antenna device 10C of FIG. 9, the same components as those of the antenna device 10B of FIG.
　アンテナ装置１０Ｃは、アンテナ装置１０Ｂと同様に、アンテナ素子１３、アンテナ角度調整機構１４、台座２０及び脚部２１を備える。また、アンテナ装置１０Ｃは、アンテナ台１２Ｃ及び緩衝部２５Ｃを備える。アンテナ台１２Ｃは、アンテナ装置１０Ｂのアンテナ台１２Ｂと比較して、中央のねじ穴４３が、貫通穴５４となっている点が異なる。また、緩衝部２５Ｃが、ゴム又はクッションである点が異なる。また、アンテナ装置１０Ｃは、支柱５１及び中間部材５２を備える。 Similar to the antenna device 10B, the antenna device 10C includes an antenna element 13, an antenna angle adjustment mechanism 14, a pedestal 20, and a leg portion 21. The antenna device 10C also includes an antenna mount 12C and a buffer unit 25C. The antenna base 12C is different from the antenna base 12B of the antenna device 10B in that the central screw hole 43 is a through hole 54. Also, the difference is that the buffer portion 25C is a rubber or a cushion. The antenna device 10C also includes a support 51 and an intermediate member 52.
　アンテナ装置１０Ｃにおける台座２０、脚部２１及び支柱５１は、アンテナ装置１０の支持部１１の一例に相当する。アンテナ装置１０Ｃにおける中間部材５２、当該中間部材５２の中央に形成されているねじ穴５３、及び、支柱５１の少なくとも一部に切られているねじ溝４４は、アンテナ高調整機構１５の一例に相当する。 The pedestal 20, the legs 21, and the support 51 in the antenna device 10C correspond to an example of the support 11 of the antenna device 10. The intermediate member 52 in the antenna device 10C, the screw hole 53 formed in the center of the intermediate member 52, and the screw groove 44 cut in at least a part of the support column 51 correspond to an example of the antenna height adjustment mechanism 15. Do.
　支柱５１は、台座２０の上面中央に、当該台座２０に対して垂直に固定されており、上方へ延びている。 The post 51 is fixed to the center of the upper surface of the pedestal 20 perpendicularly to the pedestal 20 and extends upward.
　中間部材５２のねじ穴５３は、支柱５１のねじ溝４４と螺合している。また、中間部材５２の上面には、緩衝部２５Ｃが設けられている。なお、図９には、中間部材５２がアンテナ台１２Ｃよりも小さい場合を示しているが、本実施の形態では、これに限られず、中間部材５２の大きさがアンテナ台１２Ｃと同じ又はそれ以上であってもよい。 The screw hole 53 of the intermediate member 52 is screwed with the screw groove 44 of the support 51. In addition, a buffer portion 25C is provided on the upper surface of the intermediate member 52. Although FIG. 9 shows the case where the intermediate member 52 is smaller than the antenna base 12C, the present embodiment is not limited to this, and the size of the intermediate member 52 is the same as or larger than that of the antenna base 12C. It may be
　アンテナ台１２Ｃは、中央の貫通穴５４に支柱５１が挿入され、中間部材５２に載置されている。 In the antenna stand 12C, the support 51 is inserted into the central through hole 54 and mounted on the intermediate member 52.
　アンテナ装置１０Ｃの構成によれば、支柱５１のねじ溝４４と中間部材５２のねじ穴５３とが螺合しているので、中間部材５２を回転させることにより、中間部材５２及びそれに載置しているアンテナ台１２Ｃの高さを変えることができる。 According to the configuration of the antenna device 10C, since the screw groove 44 of the support 51 and the screw hole 53 of the intermediate member 52 are screwed together, the intermediate member 52 and the intermediate member 52 are mounted by rotating the intermediate member 52. The height of the antenna stand 12C can be changed.
　例えば、中間部材５２を時計回りに回転させることにより、アンテナ台１２Ｃの位置を下方（マンホール蓋１０２から離れる方向）に移動させることができる。反対に、中間部材５２を反時計回りに回転させることにより、アンテナ台１２の位置を上方（マンホール蓋１０２に近づく方向）に移動させることができる。これにより、アンテナ装置１０Ｃの設置現場で、電波防護指針の条件を満たすように、電波の電磁界強度を調整することができる。 For example, by rotating the intermediate member 52 clockwise, the position of the antenna base 12C can be moved downward (in a direction away from the manhole cover 102). Conversely, by rotating the intermediate member 52 counterclockwise, the position of the antenna base 12 can be moved upward (in the direction approaching the manhole cover 102). Thereby, the electromagnetic field intensity of the radio wave can be adjusted so as to satisfy the condition of the radio wave protection guideline at the installation site of the antenna device 10C.
　また、中間部材５２の上面に緩衝部２５Ｃを設けることにより、脚部２１、支柱５１及び中間部材５２が外部から受けた振動が、アンテナ台１２Ｃに直接伝達することを、抑止することができる。これにより、外部からの振動によって、アンテナ台１２Ｃに設置されているアンテナ素子１３の位置（例えば角度）がずれたり、アンテナ素子１３のコネクタケーブル１６が抜けたりすること等を抑止することができる。 Further, by providing the buffer portion 25C on the upper surface of the intermediate member 52, it is possible to suppress direct transmission of the vibration received from the outside by the leg portion 21, the support 51 and the intermediate member 52 to the antenna base 12C. As a result, it is possible to prevent the position (for example, the angle) of the antenna element 13 installed on the antenna stand 12C from shifting or the connector cable 16 of the antenna element 13 coming off due to vibration from the outside.
　なお、アンテナ台１２Ｃが振動等で、支柱５１を軸に勝手に回転しないように、回転防止機構（図示せず）が設けられている。回転防止機構は、例えば、アンテナ台１２Ｃの中間部材５２と接する部分に穴（図示せず）が形成され、中間部材５２が上方へ延びる突起部（図子せず）を有し、当該突起部がアンテナ台１２Ｃの穴に挿入される構成を採る。なお、アンテナ台１２には、同心円上に、等間隔に複数の穴が形成されてもよい。これにより、アンテナ台１２Ｃを、所望の回転角の位置に固定することができる。 A rotation prevention mechanism (not shown) is provided so that the antenna base 12C does not freely rotate around the support column 51 due to vibration or the like. In the rotation preventing mechanism, for example, a hole (not shown) is formed in a portion in contact with the intermediate member 52 of the antenna base 12C, and the intermediate member 52 has a projection (not shown) extending upward, and the projection Is inserted into the hole of the antenna base 12C. A plurality of holes may be formed on the antenna base 12 at equal intervals concentrically. Thereby, antenna stand 12C can be fixed to the position of a desired rotation angle.
　また、支柱５１には、高さ方向に目盛り（図示せず）が設けられてもよい。これにより、別途、測量器具を用いなくても、目視でアンテナ台１２Ｃの高さを確認できる。すなわち、設置現場における電波の電磁界強度の調整が、さらに容易になる。 Further, the support 51 may be provided with a scale (not shown) in the height direction. Thereby, the height of the antenna stand 12C can be visually confirmed without using a survey instrument separately. That is, adjustment of the electromagnetic field intensity of the radio wave at the installation site becomes easier.
　＜実施の形態４のまとめ＞
　以上のように、実施の形態４では、地下埋没型のアンテナ装置１０Ｃが、中間部材５２のねじ穴５３と、支柱５１のねじ溝４４とが螺合し、当該中間部材５２にアンテナ台１２Ｃが載置されている構成を採る。これにより、作業員は、アンテナ装置１０Ｃの作業現場において、中間部材５２を回転させて高さを決め、その後、アンテナ台１２Ｃを中間部材５２に載置することで、アンテナ台１２Ｃの高さを容易に調整することができる。 <Summary of Embodiment 4>
As described above, in the fourth embodiment, in the underground embedded antenna device 10C, the screw hole 53 of the intermediate member 52 and the screw groove 44 of the support column 51 are screwed together, and the antenna base 12C is attached to the intermediate member 52. Take the configuration that is placed. Accordingly, the worker rotates the intermediate member 52 to determine the height at the work site of the antenna device 10C, and then mounts the antenna base 12C on the intermediate member 52, thereby setting the height of the antenna base 12C. It can be easily adjusted.
　（実施の形態５）
　＜アンテナ装置の構成＞
　次に、図１０を参照しながら、実施の形態５に係るアンテナ装置１０Ｄの構成について説明する。図１０は、アンテナ装置１０Ｄの側面断面図である。なお、図１０のアンテナ装置１０Ｄにおいて、図８のアンテナ装置１０Ｂと共通する構成部分には同一符号を付して説明を省略する。 Fifth Embodiment
<Configuration of Antenna Device>
Next, the configuration of an antenna device 10D according to the fifth embodiment will be described with reference to FIG. FIG. 10 is a side sectional view of the antenna device 10D. In the antenna device 10D of FIG. 10, the same components as in the antenna device 10B of FIG. 8 will be assigned the same reference numerals and descriptions thereof will be omitted.
　アンテナ装置１０Ｄは、アンテナ装置１０Ｂと同様に、アンテナ素子１３及びアンテナ角度調整機構１４を備える。また、アンテナ装置１０Ｄは、アンテナ台１２Ｄ、ハンドル部６１、シャフト部６２、軸受部６３及びガイド部６４を備える。アンテナ台１２Ｄは、アンテナ台１２Ｂと比較して、側面に突起部６６が設けられている点が異なる。 The antenna device 10D includes the antenna element 13 and the antenna angle adjustment mechanism 14 similarly to the antenna device 10B. The antenna device 10D further includes an antenna base 12D, a handle 61, a shaft 62, a bearing 63, and a guide 64. The antenna stand 12D is different from the antenna stand 12B in that a protrusion 66 is provided on the side surface.
　アンテナ装置１０Ｄにおけるシャフト部６２は、アンテナ装置１０の支持部１１の一例に相当する。アンテナ装置１０Ｄにおけるアンテナ台１２Ｄのねじ穴４３、及び、シャフト部６２の少なくとも一部に切られているねじ溝４４は、アンテナ高調整機構１５の一例に相当する。 The shaft portion 62 in the antenna device 10D corresponds to an example of the support portion 11 of the antenna device 10. The screw hole 43 of the antenna base 12D in the antenna device 10D and the screw groove 44 cut in at least a part of the shaft portion 62 correspond to an example of the antenna height adjustment mechanism 15.
　ハンドル部６１は、マンホール蓋１０２の下方に、当該マンホール蓋１０２に対向して水平に配置される。 The handle portion 61 is disposed horizontally below the manhole cover 102 so as to face the manhole cover 102.
　シャフト部６２は、一端が、ハンドル部６１の中心に、当該ハンドル部６１に対して垂直に溶接されており、上方へ延びている。 The shaft portion 62 is welded at one end to the center of the handle portion 61 perpendicularly to the handle portion 61 and extends upward.
　軸受部６３は、マンホール蓋１０２の下面の中心に設けられており、シャフト部６２の他端（つまりハンドル部６１に溶接されていない方の端）を回転可能に受ける。 The bearing portion 63 is provided at the center of the lower surface of the manhole cover 102, and rotatably receives the other end of the shaft portion 62 (that is, the end not welded to the handle portion 61).
　アンテナ台１２Ｄのねじ穴４３は、シャフト部６２のねじ溝４４と螺合している。 The screw hole 43 of the antenna base 12D is screwed with the screw groove 44 of the shaft portion 62.
　ガイド部６４は、長手方向にスライド溝６５が形成されている。そして、ガイド部６４は、スライド溝６５がシャフト部６２と平行となるように、側壁部１０１に固定される。スライド溝６５には、アンテナ台１２Ｄの突起部６６が挿入される。これにより、アンテナ台１２Ｄの回転が防止される。したがって、スライド溝６５及びアンテナ台１２Ｄの突起部６６は、回転防止機構の一例に相当する。 The guide groove 64 is formed with a slide groove 65 in the longitudinal direction. The guide portion 64 is fixed to the side wall portion 101 so that the slide groove 65 is parallel to the shaft portion 62. The protrusion 66 of the antenna base 12D is inserted into the slide groove 65. Thereby, rotation of antenna stand 12D is prevented. Therefore, the slide groove 65 and the projection 66 of the antenna base 12D correspond to an example of the rotation preventing mechanism.
　アンテナ装置１０Ｄの構成によれば、シャフト部６２のねじ溝４４とアンテナ台１２Ｄのねじ穴４３とが螺合しているので、ハンドル部６１を回転させてシャフト部６２を軸回転させることにより、アンテナ台１２Ｄの高さを変えることができる。 According to the configuration of the antenna device 10D, since the screw groove 44 of the shaft portion 62 and the screw hole 43 of the antenna base 12D are screwed together, the handle portion 61 is rotated to axially rotate the shaft portion 62. The height of the antenna stand 12D can be changed.
　例えば、ハンドル部６１を時計回りに回転させることにより、アンテナ台１２Ｄの位置を上方（マンホール蓋１０２に近づく方向）に移動させることができる。反対に、ハンドル部６１を反時計回りに回転させることにより、アンテナ台１２Ｄの位置を下方（マンホール蓋１０２から離れる方向）に移動させることができる。このとき、スライド溝６５に挿入されている突起部６６がアンテナ台１２Ｄの回転を妨げるので、アンテナ台１２Ｄは、回転することなく上下方向へ移動する。 For example, by rotating the handle portion 61 clockwise, the position of the antenna base 12D can be moved upward (in a direction approaching the manhole cover 102). On the other hand, by rotating the handle portion 61 counterclockwise, the position of the antenna base 12D can be moved downward (in a direction away from the manhole cover 102). At this time, since the projection 66 inserted in the slide groove 65 prevents the rotation of the antenna base 12D, the antenna base 12D moves in the vertical direction without rotating.
　また、ガイド部６４には、高さ方向に目盛り６７が設けられてもよい。これにより、別途、測量器具を用いなくても、目視でアンテナ台１２Ｄの高さを確認することができる。すなわち、設置現場における電波の電磁界強度の調整が、さらに容易になる。 Further, the guide portion 64 may be provided with a scale 67 in the height direction. Thereby, the height of antenna stand 12D can be checked visually, without using a survey instrument separately. That is, adjustment of the electromagnetic field intensity of the radio wave at the installation site becomes easier.
　＜実施の形態５のまとめ＞
　以上のように、実施の形態５では、地下埋没型のアンテナ装置１０Ｄは、アンテナ台１２Ｄのねじ穴４３と、シャフト部６２のねじ溝４４とが螺合し、シャフト部６２の端にハンドル部６１が溶接されている構成を採る。これにより、作業員は、アンテナ装置１０Ｄの設置現場において、ハンドル部６１を回転させることで、アンテナ台１２Ｄの高さを容易に調整することができる。 <Summary of Embodiment 5>
As described above, in the fifth embodiment, in the underground buried type antenna device 10D, the screw hole 43 of the antenna base 12D and the screw groove 44 of the shaft portion 62 are screwed together, and the handle portion is at the end of the shaft portion 62. Take a configuration in which 61 is welded. As a result, the worker can easily adjust the height of the antenna base 12D by rotating the handle portion 61 at the installation site of the antenna device 10D.
　（実施の形態６）
　＜アンテナ装置の構成＞
　次に、図１１を参照しながら、実施の形態６に係るアンテナ装置１０Ｅの構成について説明する。図１１は、アンテナ装置１０Ｅの斜視図である。なお、アンテナ装置１０Ｅにおいて、図１０のアンテナ装置１０Ｄと共通する構成部分には同一符号を付して説明を省略する。 Sixth Embodiment
<Configuration of Antenna Device>
Next, the configuration of the antenna device 10E according to the sixth embodiment will be described with reference to FIG. FIG. 11 is a perspective view of the antenna device 10E. In the antenna device 10E, the same components as in the antenna device 10D of FIG.
　アンテナ装置１０Ｅは、アンテナ装置１０Ｄと同様に、アンテナ素子１３、アンテナ角度調整機構１４及びシャフト部６２を備える。また、アンテナ装置１０Ｅは、アンテナ台１２Ｅ、支柱２２、ハンドル部７１及びマンホール蓋１０２を備える。アンテナ台１２Ｅは、図８に示すアンテナ台１２Ｂと比較して、中央以外の部分に貫通穴７２が形成されている点が異なる。貫通穴７２の内径は、支柱２２の外径よりも大きい。 Similar to the antenna device 10D, the antenna device 10E includes the antenna element 13, the antenna angle adjustment mechanism 14, and the shaft portion 62. The antenna device 10E further includes an antenna base 12E, a support 22, a handle portion 71, and a manhole cover 102. The antenna stand 12E is different from the antenna stand 12B shown in FIG. 8 in that a through hole 72 is formed in a portion other than the center. The inner diameter of the through hole 72 is larger than the outer diameter of the support 22.
　アンテナ装置１０Ｅにおける支柱２２及びシャフト部６２は、アンテナ装置１０の支持部１１の一例に相当する。アンテナ装置１０Ｅにおけるアンテナ台１２Ｅのねじ穴４３及びシャフト部６２のねじ溝４４は、アンテナ高調整機構１５の一例に相当する。 The support 22 and the shaft portion 62 in the antenna device 10E correspond to an example of the support portion 11 of the antenna device 10. The screw hole 43 of the antenna base 12E and the screw groove 44 of the shaft portion 62 in the antenna device 10E correspond to an example of the antenna height adjustment mechanism 15.
　支柱２２は、マンホール蓋１０２の中央以外の部分に、当該マンホール蓋１０２に対して垂直に固定され、下方へ延びている。図１１は、支柱２２が２本の例を示している。ただし、本実施の形態では、これに限られず、支柱２２の数は、１本でもよいし、３本以上でもよい。 The support 22 is fixed to a portion other than the center of the manhole cover 102 perpendicularly to the manhole cover 102 and extends downward. FIG. 11 shows an example in which two columns 22 are provided. However, the present embodiment is not limited to this, and the number of posts 22 may be one or three or more.
　シャフト部６２は、マンホール蓋１０２の中央に、当該マンホール蓋１０２に対して垂直に設けられ、下方へ延びている。そして、シャフト部６２は、上端が、マンホール蓋１０２の軸受部（図示せず）に受けられており、軸回転可能である。 The shaft portion 62 is provided vertically at the center of the manhole cover 102 with respect to the manhole cover 102 and extends downward. The upper end of the shaft portion 62 is received by a bearing portion (not shown) of the manhole cover 102, and is axially rotatable.
　アンテナ台１２Ｅのねじ穴４３は、シャフト部６２のねじ溝４４と螺合している。また、アンテナ台１２Ｅの貫通穴７２には、支柱２２が挿入されている。 The screw hole 43 of the antenna base 12E is screwed with the screw groove 44 of the shaft portion 62. Further, a support 22 is inserted into the through hole 72 of the antenna stand 12E.
　ハンドル部７１は、シャフト部６２と連結可能である。ハンドル部７１をシャフト部６２に連結し、ハンドル部７１を回転させると、シャフト部６２が軸回転する。 The handle portion 71 can be connected to the shaft portion 62. When the handle portion 71 is connected to the shaft portion 62 and the handle portion 71 is rotated, the shaft portion 62 is axially rotated.
　マンホール蓋１０２の中央には、ハンドル部６１を外部からシャフト部６２に連結させるための貫通穴７３が形成されている。 At the center of the manhole cover 102, a through hole 73 for connecting the handle portion 61 to the shaft portion 62 from the outside is formed.
　アンテナ装置１０Ｅの構成によれば、シャフト部６２のねじ溝４４とアンテナ台１２Ｅのねじ穴４３とが螺合しているので、ハンドル部７１を、マンホール蓋１０２の貫通穴７３を介してシャフト部６２に連結して回転させることにより、アンテナ台１２Ｅの高さを変えることができる。すなわち、マンホール蓋１０２を開けなくても、アンテナ台１２Ｅの高さを調整することができる。 According to the configuration of the antenna device 10E, since the screw groove 44 of the shaft portion 62 and the screw hole 43 of the antenna base 12E are screwed together, the handle portion 71 is inserted into the shaft portion via the through hole 73 of the manhole cover 102. The height of the antenna base 12E can be changed by connecting it to 62 and rotating it. That is, the height of the antenna stand 12E can be adjusted without opening the manhole cover 102.
　例えば、ハンドル部７１を時計回りに回転させてシャフト部６２を回転させることにより、アンテナ台１２Ｅの位置を上方（マンホール蓋１０２に近づく方向）に移動させることができる。反対に、ハンドル部７１を反時計回りに回転させてシャフト部６２を回転させることにより、アンテナ台１２Ｅの位置を下方（マンホール蓋１０２から離れる方向）に移動させることができる。 For example, by rotating the handle portion 71 clockwise and rotating the shaft portion 62, the position of the antenna base 12E can be moved upward (in the direction approaching the manhole cover 102). Conversely, by rotating the handle portion 71 counterclockwise to rotate the shaft portion 62, the position of the antenna base 12E can be moved downward (in a direction away from the manhole cover 102).
　このとき、アンテナ台１２Ｅの貫通穴７２に挿入されている支柱２２が当該アンテナ台１２Ｅの回転を妨げるので、アンテナ台１２Ｅは、回転することなく上下方向へ移動する。したがって、アンテナ台１２の貫通穴７２及び当該貫通穴７２に挿入されている支柱２２は、回転防止機構の一例に相当する。 At this time, since the columns 22 inserted into the through holes 72 of the antenna mount 12E prevent the rotation of the antenna mount 12E, the antenna mount 12E moves in the vertical direction without rotating. Therefore, the through hole 72 of the antenna base 12 and the support 22 inserted into the through hole 72 correspond to an example of the rotation preventing mechanism.
　なお、シャフト部６２又は支柱２２には、高さ方向に目盛り（図示せず）が設けられてもよい。これにより、別途、測量器具を用いなくても、目視でアンテナ台１２Ｅの高さを確認できる。すなわち、設置現場における電波の電磁界強度の調整が、さらに容易になる。 A scale (not shown) may be provided on the shaft portion 62 or the support 22 in the height direction. Thereby, the height of the antenna stand 12E can be visually confirmed without using a survey instrument separately. That is, adjustment of the electromagnetic field intensity of the radio wave at the installation site becomes easier.
　＜実施の形態６のまとめ＞
　以上のように、実施の形態６では、地下埋没型のアンテナ装置１０Ｅが、アンテナ台１２Ｅのねじ穴４３と、シャフト部６２のねじ溝４４とが螺合し、マンホール蓋１０２の貫通穴７３を介して、ハンドル部７１を、シャフト部６２に連結可能な構成を採る。これにより、作業員は、アンテナ装置１０Ｅの設置現場において、ハンドル部７１を、マンホール蓋１０２の貫通穴７３を介して、シャフト部６２に連結して回転させることで、マンホール蓋１０２を開けずに、アンテナ台１２Ｅの高さを容易に調整することができる。 <Summary of Embodiment 6>
As described above, in the sixth embodiment, in the underground buried antenna device 10E, the screw hole 43 of the antenna base 12E and the screw groove 44 of the shaft portion 62 are screwed together, and the through hole 73 of the manhole cover 102 is formed. The handle portion 71 is configured to be connectable to the shaft portion 62 via the same. Thereby, the worker connects the handle portion 71 to the shaft portion 62 via the through hole 73 of the manhole cover 102 and rotates the manhole cover 102 without opening it at the installation site of the antenna device 10E. The height of the antenna base 12E can be easily adjusted.
　（実施の形態７）
　＜アンテナ装置の構成＞
　次に、図１２から図１４を参照しながら、実施の形態７に係るアンテナ装置１０Ｆの構成について説明する。図１２は、アンテナ装置１０Ｆの斜視図である。図１３は、アンテナ装置１０Ｆの平面図である。図１４は、アンテナ装置１０Ｆの側面図である。なお、図１４は、アンテナ装置１０Ｆの高さを大きくし、当該アンテナ装置１０Ｆをマンホール１００に収容した場合の図である。 Seventh Embodiment
<Configuration of Antenna Device>
Next, the configuration of the antenna device 10F according to the seventh embodiment will be described with reference to FIGS. 12 to 14. FIG. 12 is a perspective view of the antenna device 10F. FIG. 13 is a plan view of the antenna device 10F. FIG. 14 is a side view of the antenna device 10F. In addition, FIG. 14 is a figure at the time of enlarging the height of the antenna apparatus 10F, and accommodating the said antenna apparatus 10F in the manhole 100. FIG.
　アンテナ装置１０Ｆは、底フレーム２０１、脚部２０２、支柱２０７、上フレーム２０８、第１補強材２２０、第２補強材２２１、アンテナ素子１３、装置取付板２４０、及び、把手２５０を備える。 The antenna device 10F includes a bottom frame 201, legs 202, a support 207, an upper frame 208, a first reinforcing member 220, a second reinforcing member 221, an antenna element 13, a device mounting plate 240, and a handle 250.
　底フレーム２０１は、方形のフレーム構造である。底フレーム２０１の四隅にはそれぞれ脚部２０２を固定するための穴２１０が形成されている。 The bottom frame 201 is a square frame structure. Holes 210 for fixing the legs 202 are formed at the four corners of the bottom frame 201, respectively.
　４つの脚部２０２は、それぞれ、接地部２０３と、当該接地部２０３から上方へ垂直に延出するロッド２０４と、当該ロッド２０４に形成されているネジ溝と螺合し回転によって上下方向に移動可能な高さ調整具２０５と、を有する。 The four legs 202 respectively move in the vertical direction by screwing with the ground portion 203, a rod 204 extending vertically upward from the ground portion 203, and a screw groove formed in the rod 204. And a possible height adjustment tool 205.
　脚部２０２におけるロッド２０４は、上方部分から、底フレーム２０１の隅の穴２１０に挿入される。図１４に示すように、底フレーム２０１の底面と高さ調整具２０５の上面とが接した状態で、底フレーム２０１は高さ調整具２０５に支持される。高さ調整具２０５の位置を上下方向に移動させることにより、底フレーム２０１の高さ位置、すなわちアンテナ装置１０Ｆのアンテナ素子１３の上端からマンホール蓋１０２の上面（地表）までの高さｈを調整する。このように高さｈを調整することにより、電波防護指針の条件を満たすように、電波の電磁界強度を調整できる。そして、ロッド２０４の上方からナット（図示せず）を螺合し、脚部２０２を底フレーム２０１に固定する。 The rods 204 in the legs 202 are inserted into the holes 210 in the corners of the bottom frame 201 from the upper part. As shown in FIG. 14, the bottom frame 201 is supported by the height adjustment tool 205 in a state where the bottom surface of the bottom frame 201 is in contact with the top surface of the height adjustment tool 205. By moving the position of the height adjustment tool 205 in the vertical direction, the height h from the height position of the bottom frame 201, that is, the upper end of the antenna element 13 of the antenna device 10F to the upper surface (ground) of the manhole cover 102 is adjusted Do. By adjusting the height h in this manner, it is possible to adjust the electromagnetic field intensity of the radio wave so as to satisfy the condition of the radio wave protection guideline. Then, a nut (not shown) is screwed from above the rod 204 to fix the leg portion 202 to the bottom frame 201.
　脚部２０２の接地部２０３にはゴム素材が使用されてよい。接地部２０３にゴム素材を使用することにより、マンホール１００の振動がアンテナ装置１０Ｆに伝達すること抑制できると共に、マンホール１００内におけるアンテナ装置１０Ｆの位置ズレを抑制できる。 A rubber material may be used for the ground portion 203 of the leg portion 202. By using a rubber material for the ground portion 203, the vibration of the manhole 100 can be suppressed from being transmitted to the antenna device 10F, and the positional deviation of the antenna device 10F in the manhole 100 can be suppressed.
　４つの支柱２０７は、それぞれ、下端が底フレーム２０１の四隅に固定され、上方へ垂直に延出している。図１２及び図１３に示すように、支柱２０７の外側の面は、アンテナ装置１０Ｆを収容したり取り出したりする際にマンホール１００の内壁を傷つけないように、面取りされている。 The lower ends of the four columns 207 are fixed to the four corners of the bottom frame 201 and extend vertically upward. As shown in FIG.12 and FIG.13, the outer surface of the support | pillar 207 is chamfered so that the inner wall of the manhole 100 may not be damaged, when accommodating and taking out the antenna apparatus 10F.
　上フレーム２０８は、底フレーム２０１と同様の方形のフレーム構造である。上フレーム２０８の四隅は、それぞれ、４つの支柱２０７の上端に固定されている。 The upper frame 208 is a rectangular frame structure similar to the bottom frame 201. The four corners of the upper frame 208 are fixed to the upper ends of the four columns 207, respectively.
　第１補強材２２０は、底フレーム２０１の１つの対角線に設けられ、両端がそれぞれ底フレーム２０１の角又は辺に固定される。これにより、底フレーム２０１のフレーム構造が補強される。 The first reinforcing members 220 are provided on one diagonal of the bottom frame 201, and both ends thereof are fixed to the corners or sides of the bottom frame 201, respectively. Thereby, the frame structure of the bottom frame 201 is reinforced.
　第２補強材２２１は、第１補強材２２０と平行な、上フレーム２０８の１つの対角線に設けられ、両端がそれぞれ上フレーム２０８の角又は辺に固定される。これにより、上フレーム２０８のフレーム構造が補強される。 The second reinforcing member 221 is provided on one diagonal of the upper frame 208 parallel to the first reinforcing member 220, and both ends thereof are fixed to the corners or sides of the upper frame 208, respectively. Thereby, the frame structure of the upper frame 208 is reinforced.
　２本のアンテナ素子１３は、それぞれ、第２補強材２２１上に設置され、上方へ垂直に延出している。２本のアンテナ素子１３は、それぞれ、第２補強材２２１上の任意の位置に設置可能である。例えば、図１５に示すように、２本のアンテナ素子の間隔を調整できる。 The two antenna elements 13 are respectively disposed on the second reinforcing member 221 and extend vertically upward. The two antenna elements 13 can be installed at arbitrary positions on the second reinforcing member 221, respectively. For example, as shown in FIG. 15, the distance between two antenna elements can be adjusted.
　また、第２補強材２２１の長さは、上フレーム２０８の１辺の長さよりも大きい。よって、本実施の形態のように、２本のアンテナ素子１３を第２補強材２２１上に設けることにより、上フレーム２０８の１辺上に設けるよりも、２本のアンテナ素子１３の可動域を大きく採ることができる。すなわち、２本のアンテナ素子１３の間隔をより柔軟に調整できる。 Further, the length of the second reinforcing member 221 is larger than the length of one side of the upper frame 208. Therefore, by providing the two antenna elements 13 on the second reinforcing member 221 as in the present embodiment, the movable areas of the two antenna elements 13 can be made more than those provided on one side of the upper frame 208. It can be taken large. That is, the distance between the two antenna elements 13 can be adjusted more flexibly.
　このように、上フレーム２０８の対角線上に第２補強材２２１を設け、当該第２補強材２２１上にアンテナ素子１３を設置することにより、上フレーム２０８の補強とアンテナ素子１３の可動域の拡大の両方を実現できる。 Thus, by providing the second reinforcing member 221 on the diagonal of the upper frame 208 and installing the antenna element 13 on the second reinforcing member 221, the reinforcement of the upper frame 208 and the expansion of the movable range of the antenna element 13 are provided. Both can be realized.
　装置取付板２４０は、一端が第１補強材２２０に他端が第２補強材２２１に固定されている。装置取付板２４０には、図１６に示すように、無線装置（ＳＲＥ：low power Small optical remote Radio Equipment）３００が取り付けられる。なお、装置取付板２４０には、無線装置３００を固定するための機構が設けられてよい。当該機構は、スライド機構であってよい。或いは、当該機構は、ボルトとナットによる締結機構であってよい。また、装置取付板２４０は、図１７に示すように、無線装置３００の大きさに合わせて、上下方向の位置を任意に変更可能であってよい。 The device mounting plate 240 has one end fixed to the first reinforcing member 220 and the other end fixed to the second reinforcing member 221. As shown in FIG. 16, a low power small optical remote radio equipment (SRE) 300 is mounted on the device mounting plate 240. The device mounting plate 240 may be provided with a mechanism for fixing the wireless device 300. The mechanism may be a slide mechanism. Alternatively, the mechanism may be a bolt and nut fastening mechanism. Further, as shown in FIG. 17, the device mounting plate 240 may be capable of arbitrarily changing the position in the vertical direction in accordance with the size of the wireless device 300.
　無線装置３００には、コネクタケーブル（図示せず）を介して、アンテナ素子１３が接続されている。なお、アンテナ装置１０Ｆに無線装置３００が取り付けられたものを、無線基地局と呼んでもよい。 The antenna element 13 is connected to the wireless device 300 via a connector cable (not shown). In addition, what attached the radio | wireless apparatus 300 to the antenna apparatus 10F may be called a radio | wireless base station.
　２つの把手２５０は、それぞれ、上フレーム２０８の対向する辺上に固定される。把手２５０は、アンテナ装置１０Ｆをマンホール１００から取り出す際に用いられる。 The two handles 250 are fixed on opposite sides of the upper frame 208, respectively. The handle 250 is used when taking out the antenna device 10F from the manhole 100.
　支柱２０７には、フック２５１が設けられている。管路１０５（図１４参照）を通じて無線装置３００に繋がっている通信ケーブル３０１及び電気ケーブル３０２は、アンテナ装置１０Ｆをマンホール１００から取り出せるように、余裕のある長さになっている。そこで、図１６に示すように、アンテナ装置１０Ｆをマンホール１００に収容する際には、ケーブル３０１、３０２をフック２５１に掛ける。これにより、ケーブル３０１、３０２が絡まったり折れ曲がったり等して断線すること防止できる。図１６に示すように、フック２５１は、支柱２０７からアンテナ装置１０Ｆの内側の方向へ突出している。この構成により、アンテナ装置１０Ｆをマンホール１００に収容する際に、フック２５１がマンホール１００に引っかからない。ただし、この構成は一例であり、フック２５１は、支柱２０７からアンテナ装置１０Ｆの外側の方向へ突出していてもよいし、それ以外の構成であってもよい。 The post 207 is provided with a hook 251. The communication cable 301 and the electric cable 302 which are connected to the wireless device 300 through the conduit 105 (see FIG. 14) have a sufficient length so that the antenna device 10F can be taken out of the manhole 100. Therefore, as shown in FIG. 16, when the antenna device 10F is accommodated in the manhole 100, the cables 301 and 302 are hooked on the hook 251. As a result, it is possible to prevent the cables 301 and 302 from being broken due to being tangled or bent. As shown in FIG. 16, the hooks 251 project from the support column 207 in the direction toward the inside of the antenna device 10F. With this configuration, the hook 251 does not get caught in the manhole 100 when the antenna device 10F is accommodated in the manhole 100. However, this configuration is an example, and the hooks 251 may protrude from the support column 207 in the direction toward the outside of the antenna device 10F, or may be other configurations.
　図１３に示すように、アンテナ装置１０Ｆの最大幅（対角線上の長さ）Ｆ１は、マンホール１００に収容可能な範囲内で、マンホール１００の内径Ｒ１にできるだけ近い長さであってよい。 As shown in FIG. 13, the maximum width (diagonal length) F1 of the antenna device 10F may be as close as possible to the inner diameter R1 of the manhole 100 within a range that can be accommodated in the manhole 100.
　なお、第１補強材２２０及び第２補強材２２１を、それぞれ、底フレーム２０１及び上フレーム２０８に直接固定するのではなく、第１補強材２２０、第２補強材２２１、アンテナ素子１３及び装置取付板２４０による構成部分（以下「装置取付部分」という）は、次のように構成されてもよい。すなわち、装置取付部分は、上下方向へのスライド機構（図示せず）を有してもよい。この構成により、アンテナ装置１０Ｆ全体をマンホール１００から取り出すことなく、装置取付部分を、マンホール１００から取り出すことができる。よって、アンテナ素子１３及び無線装置３００の保守作業が容易になる。なお、この場合、装置取付部分のスライド動作を容易にするために、第２補強材２２１上に把手（図示せず）を設けてもよい。 The first reinforcing member 220 and the second reinforcing member 221 are not directly fixed to the bottom frame 201 and the upper frame 208, respectively, but the first reinforcing member 220, the second reinforcing member 221, the antenna element 13 and the device attachment The component part by the plate 240 (hereinafter referred to as “device attachment part”) may be configured as follows. That is, the device mounting portion may have a sliding mechanism (not shown) in the vertical direction. With this configuration, the device attachment portion can be taken out of the manhole 100 without taking out the entire antenna device 10F from the manhole 100. Therefore, maintenance work of the antenna element 13 and the wireless device 300 is facilitated. In this case, a handle (not shown) may be provided on the second reinforcing member 221 in order to facilitate the sliding operation of the device mounting portion.
＜マンホール（ハンドホール）の構成＞
　図１８Ａは、マンホール１００の側面の断面図の例を示す。図１８Ｂは、マンホール１００の平面図の例を示す。図１８Ｃは、図１８Ａに示すマンホール１００の図面におけるＡ－Ａ’断面図の例を示す。 <Configuration of Manhole (Handhole)>
18A shows an example of a cross-sectional view of the side surface of the manhole 100. FIG. 18B shows an example of a plan view of the manhole 100. FIG. FIG. 18C shows an example of a cross-sectional view taken along the line AA 'of the drawing of the manhole 100 shown in FIG. 18A.
　マンホール１００の内部の高さＨ１は、アンテナ素子１３を含むアンテナ装置１０Ｆ全体の高さよりも大きい。これにより、アンテナ装置１０Ｆをマンホール１００に収容できる。高さＨ２は、例えば６００ｍｍであってよい。 The height H 1 inside the manhole 100 is larger than the entire height of the antenna device 10 F including the antenna element 13. Thus, the antenna device 10F can be accommodated in the manhole 100. The height H2 may be, for example, 600 mm.
　マンホール蓋１０２の厚さＨ２は、マンホール蓋１０２の上に人又は自動車等が乗っても問題ない強度を有する厚さである。ただし、マンホール蓋１０２は、マンホール１００内に設置したアンテナ装置１０Ｆの電波伝搬に影響を及ぼさない素材で製造されることが好ましい。例えば、マンホール蓋１０２は、ＦＲＰ（Fiber-Reinforced Plastics）製であってよい。この場合、マンホール蓋１０２の厚さＨ２は、例えば５０ｍｍであってよい。 The thickness H2 of the manhole cover 102 is a thickness that has no problem even if a person or a car gets on the manhole cover 102. However, it is preferable that the manhole cover 102 be made of a material that does not affect the radio wave propagation of the antenna device 10F installed in the manhole 100. For example, the manhole cover 102 may be made of FRP (Fiber-Reinforced Plastics). In this case, the thickness H2 of the manhole cover 102 may be, for example, 50 mm.
　マンホール１００全体の高さＨ３は、上記のマンホール内の高さＨ１及びマンホール蓋１０２の高さＨ２を考慮した大きさである。例えば、高さＨ３は、７５０ｍｍであってよい。 The height H3 of the entire manhole 100 is a size in consideration of the height H1 in the above-mentioned manhole and the height H2 of the manhole cover 102. For example, the height H3 may be 750 mm.
　マンホール１００の出入口の内径Ｒ１は、図１８Ｃに示すように、アンテナ装置１０Ｆの最大幅Ｆ１（アンテナ装置１０Ｆの対角線上の長さ）よりも大きい。これにより、アンテナ装置１０Ｆをマンホール１００に収容したり、マンホール１００から取り出したりできる。内径Ｒ１は、例えば６００ｍｍであってよい。 The inside diameter R1 of the entrance and exit of the manhole 100 is larger than the maximum width F1 of the antenna device 10F (the diagonal length of the antenna device 10F), as shown in FIG. 18C. Thus, the antenna device 10F can be accommodated in the manhole 100 or taken out of the manhole 100. The inner diameter R1 may be, for example, 600 mm.
　マンホール１００の内部の形状は、円筒形であってもよいし、直方形であってもよい。また、マンホール１００は、ＦＲＰ（Fiber-Reinforced Plastics）製であってもよいし、レジン（樹脂）製であってもよい。 The internal shape of the manhole 100 may be cylindrical or rectangular. In addition, the manhole 100 may be made of FRP (Fiber-Reinforced Plastics) or may be made of resin (resin).
　また、図１８Ａに示すように、マンホール１００は、底面に水抜き穴１０７が形成されてよい。これにより、マンホール１００に侵入した雨水を、水抜き穴１０７を通じて、地中に浸透させる（排水する）ことができる。 Further, as shown in FIG. 18A, the manhole 100 may have a drain hole 107 formed on the bottom surface. Thereby, the rainwater which has invaded the manhole 100 can be permeated (drained) into the ground through the drain hole 107.
　また、図１８Ａに示すように、マンホール１００は、側面に貫通穴１０６が形成されてよい。貫通穴１０６は、マンホール１００を地中に埋没させたときに、図１４に示す管路１０５と連通する高さに形成される。この構成により、管路１０５及び貫通穴１０６を通じて、通信ケーブル３０１及び電気ケーブル３０２を、マンホール１００内に引き込むことができる。 Further, as shown in FIG. 18A, in the manhole 100, a through hole 106 may be formed on the side surface. The through hole 106 is formed at a height in communication with the conduit 105 shown in FIG. 14 when the manhole 100 is buried in the ground. With this configuration, the communication cable 301 and the electric cable 302 can be drawn into the manhole 100 through the conduit 105 and the through hole 106.
　上述のとおり、マンホール１００には、アンテナ装置１０Ｆが収容される。したがって、マンホール１００を、アンテナ装置収容体と呼んでもよい。 As described above, the manhole 100 accommodates the antenna device 10F. Therefore, the manhole 100 may be referred to as an antenna device housing.
＜実証実験結果＞
　図１９は、以下埋没型アンテナ装置に係る実証実験局の構成例を示す図である。 <Result of demonstration experiment>
FIG. 19 is a diagram showing an example of the configuration of a demonstration experiment station according to the embedded antenna apparatus described below.
　まず、評価方法について説明する。実証実験局は、一般の方が通行可能な場所から十分な離隔が確保できる管理環境内に設置した。実証実験局の構成は、図１９に示すとおりである。実証実験局の仕様は、方式がＦＤＤ－ＬＴＥ、周波数が１．５ＧＨｚ帯（ＢＡＮＤ２１）である。 First, the evaluation method will be described. The demonstration experiment station was set up in a controlled environment where sufficient separation could be secured from where people can pass. The configuration of the demonstration experiment station is as shown in FIG. The specifications of the demonstration experiment station are the FDD-LTE system and the 1.5 GHz band (BAND 21).
　当該条件において、マンホール蓋表面中心部を原点として、蓋の真上周辺における規定の各算出地点における電力密度を測定した。 Under the conditions, the power density at each prescribed calculation point immediately above the top of the lid was measured, with the center of the manhole lid surface as the origin.
　水平方向の算出地点間隔を規定のλ／１０（この場合、０．０２ｍ）以下かつ保守的な評価とするため、測定器をＭａｘＨｏｌｄ状態で掃引しつつ測定器のセンサ部を各高さで水平方向に走査し、測定値として各高さにおける電力密度の水平方向最大値を得た。その結果、アンテナ素子１３からマンホール蓋１０２の表面（地表面）までの高さを大きくすることにより、電力密度が小さくなることがわかった。すなわち、脚部２０２の高さを調節することにより、電波防護指針の条件を満たすように、電波の電磁界強度を調整できることがわかった。 In order to make a horizontal evaluation point interval less than specified λ / 10 (in this case, 0.02 m) and make a conservative evaluation, while sweeping the measuring device in MaxHold state, the sensor unit of the measuring device is horizontal at each height The scanning was in the direction, and the horizontal maximum value of the power density at each height was obtained as the measurement value. As a result, it was found that the power density is reduced by increasing the height from the antenna element 13 to the surface (ground surface) of the manhole cover 102. That is, it was found that by adjusting the height of the legs 202, the electromagnetic field intensity of the radio wave can be adjusted so as to satisfy the condition of the radio wave protection guideline.
＜熱対策＞
　外気温が高い場合、マンホール１００内が高温になる可能性がある。そこで、マンホール１００内に収容されるアンテナ装置１０Ｆの無線装置３００に対して、当該無線装置３００が高熱になることを抑制するための冷却部を設けてもよい。例えば、水又は冷却材を内部に有する冷却部（筐体）にて無線装置３００を被覆してもよい。或いは、外部からの熱を遮断する冷却部（シート）をマンホール蓋１０２に貼り付けてもよい。 <Heat measures>
When the outside temperature is high, the inside of the manhole 100 may become hot. Therefore, the wireless device 300 of the antenna device 10F housed in the manhole 100 may be provided with a cooling unit for suppressing the high temperature of the wireless device 300. For example, the wireless device 300 may be covered with a cooling unit (housing) having water or coolant inside. Alternatively, a cooling unit (sheet) for blocking external heat may be attached to the manhole cover 102.
＜水対策＞
　マンホール１００内には雨水が流入する可能性がある。そこで、マンホール１００内に収容されるアンテナ装置１０Ｆの無線装置３００には、防水加工が施されてよい。 <Water measures>
Rainwater may flow into the manhole 100. Therefore, the wireless device 300 of the antenna device 10F housed in the manhole 100 may be waterproofed.
＜変形例＞
　マンホール１００に収容されるアンテナ装置１０Ｆは、２以上の無線装置３００を取り付けてもよい。例えば、マンホール１００に収容されるアンテナ装置１０Ｆに、ＬＴＥ及び／又は５Ｇ用の無線装置と、ＬＰＷＡ（Low Power, Wide Area）用の無線装置（例えばＬｏＲａ親機）と、を取り付けてもよい。これにより、無線装置毎にマンホールを設ける場合と比較して、マンホールの数を減らすことができるので、無線装置の設置コスト及び保守コストを抑制できる。 <Modification>
The antenna device 10F housed in the manhole 100 may have two or more wireless devices 300 attached. For example, a wireless device for LTE and / or 5G and a wireless device (for example, a LoRa master device) for Low Power, Wide Area (LPWA) may be attached to the antenna device 10F housed in the manhole 100. As a result, the number of manholes can be reduced as compared to the case where a manhole is provided for each wireless device, so installation costs and maintenance costs of the wireless device can be suppressed.
＜実施の形態７のまとめ＞
　実施の形態７に係るアンテナ装置１０Ｆは、マンホール蓋１０２の下に配置される地下埋没型のアンテナ装置１０Ｆであって、アンテナ素子１３と、当該アンテナ素子１３が設置されており、当該アンテナ素子１３からマンホール蓋１０２までの距離を調整する高さ調整機構（２０４、２０５）を有する設置台（２０１、２０８）と、を備える。これにより、電波防護指針を満たす調整、及び、通信エリアの調整が可能になる。なお、設置台には、２つのアンテナ素子が、当該２つのアンテナ素子間の距離を調整可能に設置されてよい。また、アンテナ素子は、設置台からマンホール蓋に近づく方向に延出してよい。 <Summary of Embodiment 7>
The antenna device 10F according to the seventh embodiment is an underground buried antenna device 10F disposed below the manhole cover 102, and the antenna element 13 and the antenna element 13 are provided. And an installation table (201, 208) having a height adjustment mechanism (204, 205) for adjusting the distance from the manhole cover 102 to the manhole cover 102. This enables adjustment that meets radio wave protection guidelines and adjustment of the communication area. In addition, two antenna elements may be installed in the installation stand so that the distance between the two antenna elements can be adjusted. Also, the antenna element may extend from the installation stand in a direction approaching the manhole cover.
　実施の形態７に係る無線基地局は、上述のアンテナ装置１０Ｆと、当該アンテナ装置１０Ｆの設置台され、アンテナ素子１３とケーブルで接続され、アンテナ装置１０Ｆから送信される信号及びアンテナ装置１０Ｆに受信された信号に対して無線処理を行う無線装置３００と、を備える。これにより、無線装置３００とアンテナ素子１３とを結ぶケーブル長を短くでき、ケーブルでの信号減衰を抑制できる。また、これにより、無線装置３００とアンテナ装置１０Ｆとを一体として（つまり無線基地局として）マンホール１００に収容できるので、無線基地局の設置及び保守が容易になる。また、設置台は、バックホールから無線装置３００に接続されているケーブル（３０１、３０２）を保持するフック２５１を有してよい。これにより、無線基地局をマンホールから取り出して保守できるように余裕のある長さになっているバックホールのケーブルを、無線基地局をマンホール１００に収容する際に、フック２５１に掛けてまとめることができる。 The radio base station according to the seventh embodiment is provided with the antenna device 10F described above and the antenna device 10F, is connected to the antenna element 13 by a cable, and receives a signal transmitted from the antenna device 10F and the antenna device 10F. And a wireless device 300 that performs wireless processing on the received signal. Thus, the cable length connecting the wireless device 300 and the antenna element 13 can be shortened, and signal attenuation in the cable can be suppressed. Further, as a result, the radio apparatus 300 and the antenna device 10F can be accommodated integrally (that is, as a radio base station) in the manhole 100, so installation and maintenance of the radio base station are facilitated. The stand may also have hooks 251 that hold the cables (301, 302) that are connected to the wireless device 300 from the backhaul. As a result, when the radio base station is accommodated in the manhole 100, the cable of the backhaul having a sufficient length so that the radio base station can be taken out from the manhole and maintained can be put together on the hook 251 it can.
　実施の形態７に係るアンテナ装置収容体は、地中に設置された際に地表に最も近い面となる上面が開口し、上述のアンテナ装置１０Ｆを収容可能な容器（１００）と、ＦＲＰ（Fiber-Reinforced Plastics）により形成され、当該容器の開口を覆う蓋（１０２）と、を備える。これにより、収容されたアンテナ装置１０Ｆの電波伝搬に影響を及ぼすこと無く、高い加重強度を得ることができる。また、容器には、下面に水抜き穴（１０７）が形成され、側面に貫通穴（１０６）が形成されてよい。これにより、マンホール１００に侵入した雨水を排水できる。また、バックホールのケーブル（３０１、３０２）を容器内に引き込み、無線装置３００に接続できる。 In the antenna device housing according to the seventh embodiment, when installed in the ground, the upper surface which is the surface closest to the ground surface is opened, and the container (100) capable of containing the above-mentioned antenna device 10F; A lid (102) formed by Reinforced Plastics and covering the opening of the container. Thereby, high weighting strength can be obtained without affecting the radio wave propagation of the housed antenna device 10F. In the container, a drain hole (107) may be formed on the lower surface, and a through hole (106) may be formed on the side surface. Thereby, the rainwater which has entered the manhole 100 can be drained. Also, the backhaul cables (301, 302) can be pulled into the container and connected to the wireless device 300.
　上述した実施の形態は、本発明の説明のための例示であり、本発明の範囲を実施の形態にのみ限定する趣旨ではない。当業者は、本発明の要旨を逸脱することなしに、他の様々な態様で本発明を実施することができる。 The above-described embodiment is an example for describing the present invention, and the scope of the present invention is not limited to the embodiment. Those skilled in the art can practice the present invention in various other aspects without departing from the scope of the present invention.
　例えば、上述した実施の形態は、アンテナ素子１３の数が２本の例であるが、アンテナ素子１３の数は、１本でもよいし、３本以上であってもよい。 For example, although the embodiment described above is an example in which the number of antenna elements 13 is two, the number of antenna elements 13 may be one, or three or more.
　本特許出願は２０１７年８月２４日に出願した日本国特許出願第２０１７－１６１０７０号に基づきその優先権を主張するものであり、日本国特許出願第２０１７－１６１０７０号の全内容を本願に援用する。 This patent application claims the priority based on Japanese Patent Application No. 2017-161070 filed on Aug. 24, 2017, and the entire content of Japanese Patent Application No. 2017-161070 is incorporated herein by reference. Do.
　１０、１０Ａ、１０Ｂ、１０Ｃ、１０Ｄ、１０Ｅ、１０Ｆ　アンテナ装置
　１１　支持部
　１２、１２Ｂ、１２Ｃ、１２Ｄ、１２Ｅ　アンテナ台
　１３　アンテナ素子
　１４　アンテナ角度調整機構
　１５　アンテナ高調整機構
　１６　コネクタケーブル
　２０　台座
　２１　脚部
　２２　支柱
　２３　高さ調整具
　２４　中間部材
　２５Ａ、２５Ｂ、２５Ｃ　緩衝部
　２６　ロッド
　３１　筒部
　３２　固定具
　３３　円環部
　３４　筒部
　３５　補強板
　３６　ブラケット
　４１　第１支柱
　４２　第２支柱
　４６　ストッパ
　４７　ピン
　５１　支柱
　５２　中間部材
　６１　ハンドル部
　６２　シャフト部
　６３　軸受部
　６４　ガイド部
　７１　ハンドル部
　１００　マンホール（ハンドホール）
　１０２　マンホール蓋
　１０６　貫通穴
　１０７　水抜き穴
　２０１　底フレーム
　２０２　脚部
　２０３　接地部
　２０４　ロッド
　２０５　調整具
　２０７　支柱
　２０８　上フレーム
　２１０　穴
　２４０　装置取付板
　２５０　把手
　２５１　フック
　３００　無線装置
　３０１　通信ケーブル
　３０２　電気ケーブル Reference Signs List 10, 10A, 10B, 10C, 10D, 10F Antenna device 11 Support portion 12, 12B, 12C, 12D, 12E Antenna base 13 Antenna element 14 Antenna angle adjustment mechanism 15 Antenna height adjustment mechanism 16 Connector cable 20 Base 21 Leg Reference Signs List 22 post 23 height adjustment tool 24 intermediate member 25A, 25B, 25C buffer portion 26 rod 31 tube portion 32 fixture 33 annular portion 34 tube portion 35 reinforcing plate 36 bracket 41 first post 42 second post 46 stopper 47 pin 51 Strut 52 Intermediate member 61 Handle portion 62 Shaft portion 63 Bearing portion 64 Guide portion 71 Handle portion 100 Manhole (handhole)
102 Manhole Cover 106 Through Hole 107 Water Drain Hole 201 Bottom Frame 202 Leg 203 Grounding Section 204 Rod 205 Adjustment Tool 207 Column 208 Upper Frame 210 Hole 240 Device Mounting Plate 250 Handle 251 Hook 300 Radio Device 301 Communication Cable 302 Electrical Cable

Claims (7)

  1. 　蓋の下に配置される地下埋没型のアンテナ装置であって、
    　アンテナ素子と、
    　前記アンテナ素子が設置されており、前記アンテナ素子から前記蓋までの距離を調整する高さ調整機構を有する設置台と、
    　を備える、
    　アンテナ装置。     Underground buried antenna arranged under the lid,
    An antenna element,
    An installation stand provided with the antenna element and having a height adjustment mechanism for adjusting a distance from the antenna element to the lid;
    Equipped with
    Antenna device.
  2. 　前記設置台には、２つのアンテナ素子が、当該２つのアンテナ素子間の距離を調整可能に設置されている、
    　請求項１に記載のアンテナ装置。     On the installation table, two antenna elements are installed so that the distance between the two antenna elements can be adjusted.
    The antenna device according to claim 1.
  3. 　前記アンテナ素子は、前記設置台から前記蓋に近づく方向に延出している、
    　請求項１又は２に記載のアンテナ装置。     The antenna element extends in a direction approaching the lid from the installation stand.
    The antenna device according to claim 1.
  4. 　請求項１から３の何れか１項に記載のアンテナ装置と、
    　前記設置台に設置され、前記アンテナ素子とケーブルで接続され、前記アンテナ装置から送信される信号及び前記アンテナ装置に受信された信号に対して無線処理を行う無線装置と、
    　を備える、
    　無線基地局。     The antenna device according to any one of claims 1 to 3;
    A wireless device installed on the installation table, connected to the antenna element by a cable, and performing wireless processing on a signal transmitted from the antenna device and a signal received by the antenna device;
    Equipped with
    Wireless base station.
  5. 　前記設置台は、バックホールから前記無線装置に接続されているケーブルを保持するフックを有する、
    　請求項４に記載の無線基地局。     The installation stand has a hook for holding a cable connected to the wireless device from the backhaul,
    The radio base station according to claim 4.
  6. 　地中に設置された際に地表に最も近い面となる上面が開口し、請求項１から３の何れか１項に記載のアンテナ装置を収容可能な容器と、
    　ＦＲＰ（Fiber-Reinforced Plastics）により形成され、前記容器の開口を覆う蓋と、
    　を備える、
    　アンテナ装置収容体。     A container capable of containing the antenna device according to any one of claims 1 to 3, which is open at the top surface which is the surface closest to the ground surface when installed in the ground;
    A lid formed of FRP (Fiber-Reinforced Plastics) and covering the opening of the container;
    Equipped with
    Antenna device housing.
  7. 　前記容器には、下面に水抜き穴が形成され、側面に貫通穴が形成されている、
    　請求項６に記載のアンテナ装置収容体。     In the container, a drain hole is formed on the lower surface, and a through hole is formed on the side surface,
    The antenna device housing according to claim 6.
PCT/JP2018/031420 2017-08-24 2018-08-24 Antenna device, wireless base station, and antenna device container WO2019039598A1 (en)

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JP2019537713A JP6965355B2 (en) 2017-08-24 2018-08-24 Antenna device, radio base station, and antenna device housing
CN202110829287.9A CN113594664B (en) 2017-08-24 2018-08-24 Antenna device and wireless base station
CN201880059932.XA CN111108645A (en) 2017-08-24 2018-08-24 Antenna device, wireless base station, and antenna device housing
US16/640,935 US11349189B2 (en) 2017-08-24 2018-08-24 Antenna apparatus, radio base station, and antenna apparatus housing body
EP22185450.8A EP4096016A1 (en) 2017-08-24 2018-08-24 Antenna apparatus, radio base station, and antenna apparatus housing body
EP18849174.0A EP3660978B1 (en) 2017-08-24 2018-08-24 Antenna device, wireless base station, and antenna device container
US17/455,353 US11811126B2 (en) 2017-08-24 2021-11-17 Antenna apparatus and radio base station

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